Ana Ananthakumar – Product Manager, Supply Intelligence

Ana Ananthakumar – Product Manager, Supply Intelligence


Product Manager, Supply Intelligence
Chicago, IL
Joined: 2017

Ana describes his job as being an agent for Groupon’s version of the CIA. What does that entail? We’d tell you, but…just read his story to find out!

What’s your favorite Groupon memory?

On the day before Halloween, I was busy at my desk working and wearing a T-shirt and jeans (on that day, my tee-shirt and jeans combo was the most formal attire). I was already enjoying the costumes people around me were wearing. Top Gun’s Tom Cruise (our engineering manager), was sitting with his costume. A few desks away, a fox was coding. I thought that things couldn’t get any more hilarious. As if to prove me wrong, I saw all hell break loose in our office: Freddy Krueger, Jason, and a lot more of the everyday villains that haunted you were walking among us.

Where were you before joining Groupon?

I was born and raised in Sri Lanka. I graduated an Electrical Engineering major, completed CFA Level 3,  and worked for Unilever’s supply chain for four years. Then, I came to Kellogg to get my MBA. This was the first time I lived outside of Sri Lanka. Last summer, I was the product manager for a drone company. Now I am here!

So tell us about your job. What do you do? What do you love about it?

I am the Product Manager for Supply Intelligence. My product—an AI platform—brings in the best supply/merchants into Groupon. I think of it as GIA (Groupon’s Intelligence Agency – like CIA). Think of it as an ‘agent’ going out and looking at all the available merchants in the market, and gathering intel about which merchant would maximize Groupon’s value in the future ⇒ repeat. I love the fact that this is at the cutting edge of technology, and that I get to impact the entire Groupon, both North American and international as well. (This is the intimidating component as well!)

Where can we find you outside of work?

I am on okay cook (Sri Lankan and South Indian cuisines) and an excellent eater. I have won eating competitions (26 pieces of pizza in one instance). I used to play rugby and chess for school/college. I am a singer and a disaster of a dancer. Currently looking for friends who might go to fighting classes, dancing (you’ve already been warned), or climbing with me.

Tell us something about you that might surprise us.

I eat a lot of sweets. One of our team members brought in a bag full of candies that were too much even for his kid (remember, this was right after Halloween, so the bag was really big). I have been constantly eating away all those candies, alone – without the slightest hint of guilt.

I always believed that with the agile methodology things would be fast paced, but at Groupon, I have seen some of the ideas go from concept to implementation within a few sprints.

Tell us about your first impressions of Groupon.

My first interactions with Groupon were with the recruiter, an alum, and the hiring manager. I got the sense that Groupon had a very open and inclusive culture because all of these folks focused on genuinely listening to my story and understanding what I wanted to do. I also felt that Groupon focused more on potential when it came to recruiting, rather than experience (slope vs intersection argument: Groupon hires more so for the slope). This means that not only does Groupon benefit from its employees, but it also has a keen interest in investing in their skills and career development.

What do your parents think you do?

They still can’t wrap their head around the fact that a tech laggard like me is handling a product that involves a lot of AI. “So your product has something to do with AI right? And you still take notes on paper? Son, you’re like from the stone age.”

What’s unique about Groupon’s Engineering culture?

How collaborative and organized the team is. In my team, I could find a textbook example of the Agile process, and every aspect of it. We have an excellent scrum master who works on the finer details of the agile process and drives it like a religion. I remember the entire team instinctively getting up and gathering around his table at 10:30 for the daily stand…even on Mondays, the only day of the week we don’t have that meeting. As the book, “Scrum”, says, he is driving the agile methodology into our bloodstream, as a way of work that would come naturally to us.

What about the Product culture?

Despite being a large organization, I can directly see how my product impacts the business. I have responsibilities that create a meaningful impact on the entire business. This also means that I should be extremely careful about the changes I make to the product given the level of impact it has on Groupon.

What has been surprising about working at Groupon? Or what would surprise candidates to find out?

Surprising to me: How fast-paced things work. I always believed that with the agile methodology things would be fast paced, but at Groupon, I have seen some of the ideas go from concept to implementation within a few sprints.

For external folks: Work hard, play hard culture. I’ve been at Groupon for a few months and already have been with various teams to dinners, improv shows, breweries, and even rock climbing. It is great to see that the teams truly enjoy being together whether at work or outside of work!

What’s your favorite view from the office?

How does your work connect to Groupon’s mission of building the daily habit in local commerce?

My platform brings in the local commerce to the sales reps. Very direct connection.

What’s your favorite conference room?

What are your favorite local businesses?

Horror houses. I visited one and learned that Groupon has a big impact on the incoming traffic to the industry during the Halloween season.

What do you love about your team’s Software Development process?

How well defined the user stories are and how articulate the engineers are about the user stories. The dev team has a good ‘big picture view’ of how some of the changes might have downstream and upstream impact on the business. This makes it easy for me to connect the dev process with the other parts of the business and the respective stakeholders.

One of our software developers created a presentation which illustrated our process end to end. I use it all the time when I present to others about my product and process. Not only was it easy to understand, it was also quite comprehensive. Furthermore, we have a platform called Flux for our machine-learning models. As you might have already figured out, it’s a very hard concept to grasp. The engineer in charge of that explained it to me in such a manner that I could well understand what it meant for my product and for Groupon in general.

We have another engineer who has an amazing curiosity to learn. He makes sure to ask questions to hammer out the details. He sweats the details in meetings and finally when the products are built, there is no question as to any of the nuances being overlooked. I believe that this ability to articulate so well and curiosity, are key ingredients to a successful process.

John Stokvis – Technical Product Manager

John Stokvis – Technical Product Manager


Technical Product Manager
Chicago, IL
Joined: 2011

What’s your favorite conference room?

It’s not every day you get to interview a Product Manager whose secret talent is being able to balance 3 chairs on their chin…because they were once a circus performer. Talk about making big career moves!

What’s your favorite Groupon memory?

My favorite Groupon memory isn’t something big or grand. It was actually a small act, but it’s resonated with me ever since. It exemplifies what I think is special about Groupon and is the source of a lot of our success. Around 2013, I was working as an analyst building dashboards. Unprompted, a more senior employee gathered a group together (analysts and non-analysts) for a tutorial on SQL. He created a whole powerpoint presentation and walked us through concepts and small tricks he had picked up. He even scheduled several follow-ups with the group and was always available to answer questions and learn tricks. He wasn’t even on the same team as I was, but saw an opportunity to help us all improve. He’s no longer at Groupon, but I constantly think back to what he did for me. I try to keep that part of the culture alive. Supporting your teammates and making each other look good is pervasive at Groupon. It’s what I love most about working here.

So before joining Groupon you were…

An actor and circus performer. I did some theater and circus around town, as well as the occasional temp job. An actor in one of the shows I was in helped me get a job in customer service and I’ve been here ever since.

If you can remember back to 2011…what was your first impression of Groupon?

I remember it flashing across my consciousness before I started working here. It was this super cool way to get a great deal with your friends. And it just showed up in your email inbox! It’s been crazy to see where we’ve come from there.

You have an interesting career path here…tell us about it!

I started as a front-line Customer Service Rep, helping folks find their Groupons, cancel purchases, and solve issues with merchants. We had a ping-pong table in the office and there were about 10 of us who got pretty good. We all started talking about who was the best and on my breaks, I built a spreadsheet in Google Docs to figure it out (I Googled a bunch of formulas and read about the ELO ranking system – the same one that Nate Silver uses a lot on FiveThirtyEight). Then I got people to enter the results of their matches to determine who was the champion (hint: it wasn’t me). About a year in, there was a special project to use predictive analytics to predict which deals would be likely to have lots of refunds. Because of the ping pong spreadsheet, they gave me a shot and I loved it! I learned all about SQL and analytics, ended up joining the fledgling Risk Management team as their first analyst (there were 4 of us at the time, now it’s a global department!).

From there I moved to Global Operations to help build dashboards and analytics for our efforts to take Groupon’s global footprint and streamline it; at that time, we were operating in almost 50 countries, sometimes it seemed like 50 different companies, all called “Groupon.” After that, I learned about Product and moved over here. I worked on our backend merchant database for about a year and half. When Groupon acquired LivingSocial in late 2016, I joined the small core team to lead the Product effort to rebuild LivingSocial on Groupon’s infrastructure. We launched our MVP in June 2017, and I’ve been working on improving LivingSocial and the multi-brand platform ever since!

What do your parents think you do?

I asked my parents and they got it pretty spot on. My theater friends always give me blank stares when I tell them I’m a PM. So I just tell them I’m like the director and the developers are like the actors – they’re real stars. I just put myself in the mind of the audience (the customer) and point the engineers in the right direction. Then my metaphor breaks down and they nod and change the subject.

What’s unique about Groupon’s Engineering culture?

We’re scrappy. A lot of people forget that Groupon’s origin was as a hack on top of The Point, which was like a proto-Kickstarter. The very first Groupon was a deal for 2 pizzas for the price of 1 at the bar downstairs at our office, but people could only get it if enough people “pledged” to buy it. That sense of “let’s try this and see if it works” and then iterating on that is part of our DNA.

The local commerce or online-to-offline (or whatever the kids are calling it these days) is really tricky. What works for one kind of business doesn’t work for others. Everyone in Product and Engineering is game to try new things, then take the feedback from customers and merchants and learn from it. I think that’s one of the main reasons Groupon has stuck around while others haven’t. Even large companies like Google, Amazon, and Facebook have tried to get into this space and haven’t been able to crack it.

And more specific to you, what’s unique about Product Management at Groupon?

The collaboration. A lot of people think of PMs as “mini-CEOs” and some companies have PM cultures that are cut-throat and every-PM-for-her/himself. At Groupon we’re constantly sharing thoughts, partnering with each other on projects, and bouncing ideas off each other. Not all PMs come from a product background. Some do, but many come from Customer Service, Sales, Account Management. There’s a variety of experiences and backgrounds that we collectively draw from and a lot of cross-pollination.

What’s your favorite programming language?

Ruby on Rails. Because it sounds like the name of a small town in northern England.

What’s the most challenging thing you’ve worked on at Groupon?

That would be the project to rebuild LivingSocial on the Groupon platform, what we referred to internally as “Project Gemini.” Looking back, it was a truly massive undertaking. We were modifying everything, from backend to frontend, how customer service took incoming calls to how we processed payments. It touched five different departments, impacted more 300 different individuals directly, had more than 60 different workstreams. The core team that I was a part of had to not only keep track of all this action but see how the decisions we made in one place would affect things somewhere else and make the right call. It was super challenging and when we ultimately finished our MVP and cutover from old to new LivingSocial and the 6 months of work that everyone did finally pay off, it was an amazing payoff. Someone even brought a “cutover cake” that we ate at 3 am with some champagne. And that was just the MVP – getting us to the starting line!

Tell us about what your job entails and what you love about what you do.

I’m the Product Manager for LivingSocial, so I focus on the modifying and adapting the Groupon platform for the LivingSocial brand. I work closely with our Engineering, Operations, and Marketing teams to make sure the customer experience is as great as it can be.

My favorite part of the role is simply the breadth that I get to be responsible for. Most teams have a specific area they focus on (the deal page, redemption, or a single vertical like Goods or Things To Do). With LivingSocial, the team gets our hands in every part of the site. This means we often have to work together with other teams to come up with solutions. Every day I get to solve a huge variety of interesting problems, so it’s never boring. LivingSocial is the first time Groupon has tried to run a second brand on the platform, we get to tackle all sorts of new problems that the company has never had to solve before. On top of it all, I’m getting a big picture sense of how the whole system works, I get to see all the connections, which is super cool.

Tell us something about you that might surprise us.

I can balance three chairs on my chin.

What keeps you busy outside of work?

I do the occasional on-camera acting gig. My wife is an actor and I’ve still got friends in the Chicago theater scene, so I get to see a lot of really interesting theater. Chicago’s also a great biking city so I try to bike to work as much as I can (it also helps feed my podcast obsession). I love to bake (my favorite is sourdough bread) and we keep chickens in our backyard so we get fresh eggs (no, we won’t eat them and yes, they’re fine with the Chicago winters). Fresh eggs and toast definitely make breakfast my favorite meal of the day.

What’s your favorite local business?

Antica Pizzeria in Andersonville. Amazing Sicilian pizza (thin crust, not “Chicago style”) fresh out of a brick oven. The best crust in the city. My favorite one is arugula, pistachio, and speck (kind of like prosciutto) and a drizzle of olive oil. It’s delicious!

What is your favorite part of your team’s software development process?

Our retros. We really dive into the task of constantly optimizing our process. Talking about what worked and what didn’t. Why issues happened and what we can do to avoid them in the future. We try to keep a sense of psychological safety so we can be honest with each other.

Show us your favorite view from the Chicago office!

How does your work impact Groupon’s mission of building the daily habit in local commerce?

With two brands in the portfolio now, my job is to think about what LivingSocial customers are looking for when they visit the site and help them find it. Groupon and LivingSocial were competitors for most their existence but now they can work together to help customers explore the amazing things to do and see in their neighborhoods.

Tabs or spaces?

Tabs all day long.

Vim or emacs? Why?

Andrew Lisy – Director of Product, Marketplace

Andrew Lisy – Director of Product, Marketplace


Director of Product – Marketplace Team
Chicago, IL
Joined: 2014

From bond trading on Wall Street to e-commerce in Chicago, Andrew has taken his high-stakes modeling experience to the more local-focused (and probably slightly less stressful) environment of Groupon.

Tell us about what you do! What do you love about it?

I lead our marketplace teams, which comprise everything related to supply and pricing. In the supply world, we split it into two groups — Supply Intelligence (SI) and Scalable Supply (SS). The SI role is really fun because it’s heavily driven by machine learning models and decision science. I used to be a Wall Street bond trader, so a lot of the mechanics that go into determining the best merchants to bring onto Groupon’s platform are very, very similar to the models I used to use to pick the best stocks and bonds to trade as a trader. On the scalable supply side, I get very involved in partnerships with a variety of companies that do really cool stuff in the local space. We work with these companies to list their inventory on our platform. Finally, pricing is really fun for a lot of reasons — there’s the fun/academic/nerdy/trader/financial side of building out elasticity models, the immediate gratification of seeing our work appear on the front page of the site, and the thrill of working with an amazing engineering and data science team.

What do your parents think you do?

Me texting my mom: “What do you think I do for work”

Mom: “Big data? Head of all data? Analyzes data? Did you get a sitter for Friday?”

So what’s unique about being a Product Manager at Groupon?

More than anywhere else I’ve worked, being a PM at Groupon means ownership. PMs really own their areas and are ultimately responsible for the success or failure of their product(s). It’s an incredible feeling — every day, I come in and influence a big part of a major e-commerce site with tens of millions of users.

And how does your work impact Groupon’s mission of building the daily habit in local commerce?

Incredibly tightly! In order to create a daily habit, we have to have amazing supply and incredible prices. The work I do every day ensures that the merchants we’re bringing onto Groupon are the best ones to engage and delight our customers when they pull the app out of their pocket. If I do my job well, Groupon becomes an indispensable place to check every day to find great merchants around your area.

In order to create a daily habit, we have to have amazing supply and incredible prices. The work I do every day ensures that the merchants we’re bringing onto Groupon are the best ones to engage and delight our customers when they pull the app out of their pocket.

What’s your favorite Groupon memory?

When we launched card linked offers (CLO), we got a group of product managers in Chicago to go bar hopping to 3 or 4 bars that were in CLO. It was grueling work, and we were all in pretty rough shape after several hours of exhaustive product testing (and testing. and more testing). We try to do this sort of thing every time we launch something new. It’s a really fun way to “eat our own dogfood” and have a great time with co-workers.

Where were you before joining Groupon?

I was a trader — I traded convertible bonds at Merrill Lynch, options at a hedge fund, and then worked in strategy at a high-frequency trading firm. I loved the excitement of the markets, but something really clicked when I started building my own trading platforms for me and my trading group to use. One day, I work up and realized that building the platforms was what really thrilled me, and the trading part was just incidental. At that moment, I decided that I wanted to move to Product.

Smart people doing interesting work


What was your first role here and how did you get to where you are today?

I started as a Senior Product Manager on a product called Quantum Lead (QL). QL was (and is) a very data intensive program and tightly connected with our sales org, so I spent a lot of time with our data science teams and sales teams. After working on that for a while, another fairly quantitative role opened up leading our pricing team, and my experience was a good fit to take that on as well. We’re always looking to give people new challenges and opportunities, and it was a really fun space to dive into.

Where can we find you outside of work?

I like making stuff, toys, and eating. Cooking satisfies all three of these interests, so I’m really into making delicious food. I’ve also been getting into woodworking lately because it’s fun to come home from a long day of making code and jump into making physical stuff out of wood. I like making cutting boards because they’re fairly complicated to make but also can come out looking really nice. Finally, I like photography, so I document both of these hobbies on some small personal blogs I keep around.

And lastly, Vim or Emacs?

nano (/nerdcred). I used to be a pretty heavy emacs user but basically lost all of that muscle memory.

Emily – Product Management Intern

Emily – Product Management Intern


Product Management Intern
Chicago, IL
California University of Pennsylvania

40 bugs, 20 new features, 13 countries, 2 projects, 1 amazing summer internship: Emily shares her experience as a Product Management intern at Groupon (not as an exterminator, despite the bug work)

Tell us about the work you’re doing this summer!

At the beginning of the summer, I had two main projects: conduct a purchase funnel audit for EMEA/APAC and launch Welcome Cards on Mobile Web and Desktop. The audit spanned thirteen different countries and required coordination across multiple international departments. With the help of diligent Groupon employees from each country, over 40 bugs and 20 possible new features were identified. The Welcome Card project has transformed into redesigning the homepage. As the Product Manager for the re-design, I get to work with key stakeholders from different engineering teams, design, and marketing.

What’s your favorite memory from your summer here?

The group cooking class was spectacular! I hand-rolled noodles for about an hour, but who doesn’t love a good workout before filling up on pasta?

Describe your internship experience in 3 words.

Challenging, marvelous, and empowered.

What’s your biggest accomplishment this summer?

Although I will no longer be interning for Groupon when the new homepage design comes into fruition, my requirements and experiment sequence will help lay the foundation and that’s really exciting.

What do your parents think you do?

They’ve been telling people, “She finds bugs.” So now everyone thinks I’m some kind of exterminator.

What’s the most innovative technology you’ve experienced in your lifetime?

Amazon Echo

What’s the best book you’ve ever read?

The Percy Jackson Series by Rick Riordan (please don’t judge me!)

What’s your top place for eats in Chicago?

Au Cheval

What was the most surprising thing about interning at Groupon?

I was treated like a full-time employee from the start!


Groupon World Headquarters

Emily: junior at Johns Hopkins spending the summer with not 1, but 2 teams

Emily: junior at Johns Hopkins spending the summer with not 1, but 2 teams

The #GrouponU Blog is back for 2016! We’ll regularly feature a Groupon intern or recent college grad telling you about their experience tackling challenging problems and working with our teams.

Hello blog post readers! I’m Emily Brahma, a computer science major at Johns Hopkins University. Born and raised a Californian, I lived in the lovely, quiet city of Irvine until the age of 14, when I enrolled in Cate (a boarding school nestled in the hills of Carpinteria along the coast). When I got the call from Groupon offering me a Software Engineering Internship on the Application Operations (App Ops) team, I had a proud smile on my face that I couldn’t wipe away for hours. My mind pinballed from one thought to the next, imagining all the things I would do, the things I would learn, the people I would meet.

Emily Brahma

It has been six weeks since I moved to the amazing city of Chicago for the summer, and here’s what has happened so far:

Day 0: First Steps

I stepped into 600 W Chicago at 8:00 am – a very punctual thirty minutes before Groupon was expecting me. I sat at reception waiting, tapping my foot furiously. I was too excited to remain still. The rest of the interns trickled in and at 8:30 am, the whirlwind of information began: “here’s how you can generate your SSH key,” or “don’t use that staircase,” and “email payroll if you have questions,” “here’s the third Fooda station you can get lunch from!” The office was so big I remember wondering if I would manage to get myself to my desk everyday without getting lost (it took about three days, but I eventually figured it out). The University Relations team had a packed orientation day planned for us, with information sessions of course, but also some fun. We had a scavenger hunt and spent an hour running around the office – which is essentially a playground –  checking off the items on our list. We wrapped up the day with an ice cream sundae bar, where I got to meet my manager in person for the first time. He showed me to my desk and introduced me to the first team I was joining, App Ops. I set down my stuff neatly on my desk, feeling ready for my internship to begin.

Day 1: Shadowing Shomari

As my first official day on the App Ops team, I spent it shadowing my mentor on tickets. I got to learn first hand about what exactly App Ops does, and how they do it. Being “on tickets” means that Shomari was handling the tickets that come internally from other Groupon teams to handle bugs or specific requests. For the most part, this meant running scripts to solve the issue reported. This was my first time being exposed to Ruby, and I learned a lot about the basics of the language through this process.

Day 2 – Build a Ruby on Rails App to Display Tickets (Oh…I don’t know Ruby)

I came into work on Thursday and my manager was ready with his assignment for me. He told me that I would be rewriting the code for the current ticket Heads Up Display (HUD) since it was fairly old and had a few bugs. Essentially, what this means is that I was responsible for creating a Rails app from start to finish that pulled and displayed the tickets assigned to App Ops using our ticketing platform’s API. It also needed to keep track of Service Level Agreement (SLA) failures. Depending on the urgency of a ticket, if more than a set amount of time has passed, a ticket is considered to fall under an SLA failure. This meant that I would need to check for SLA failures in the background, display any tickets that fail, and add it to the database storing failed tickets.

I felt like I was standing at the edge of a cliff and had no idea how to even begin. I didn’t have much exposure to web development and had never touched Ruby before. However, my manager broke down the project into smaller, less scary cliffs and I was on my way to building my first Rails app!

Day 3 – First Pull Request

On my third day, I got to join an App Ops pull request meeting and see how code is reviewed before any changes are made to the repository. I observed my coworkers sort through the changes made in each commit and provide feedback that might better the code before it is shipped.

Day 7 – Pairing with Val

Paired programming has probably been one of the ways I’ve learned the most during my time as an intern. It has allowed me to work through problems or try something new with the guidance of one of my coworkers. My go-to person for pairing was usually Val, and he was always patient and more than happy to lend a helping hand when I asked. Although I have “Pairing with Val” listed here only once, there were several days like this. I always ended these days with a satisfied grin, knowing that I had worked through to solve a new challenge.

Day 10 – Women at Groupon Fireside Chat

The “Women at Groupon” Employee Resource Group (ERG) holds events throughout the year to engage women and encourage diverse discussion within the company. I had the chance sit in on a  “Fireside Chat” which was a Q&A between Women at Groupon and our CEO, Rich Williams. The CEO gave career advice, candidly discussed diversity at Groupon, the efforts he has put in thus far and his some of his plans to continue to improve.

Day 13 – Watch WWDC keynote

Being as tech obsessed as we are, a few of the interns and I reserved a room and spent our lunches streaming the Apple Worldwide Developers Conference. It was a great time.

Day 17 – My Ticket HUD is on TV!

At this point, I had a running version of my project, but it was just a rough draft and I still had plenty to do. However, it was enough that my team displayed it for the first time on the TV by our desks and I was thrilled. It was such a gratifying feeling to see something I built on display and being used by the people around me. At school I often code projects just to hit a submit button and never see it again, but this was the first time real people would actually be using something that I made. Needless to say, I may have taken a picture of the TV and sent it to my mom 🙂

Day 26 – Pride Parade

(Fellow interns Lily, Abby and JT with Emily @ the Chicago Pride Parade)

The Chicago Pride Parade is already such an exciting event, but it was made even better by the fact that the interns and I got to actually walk in the parade alongside Groupon’s float! We walked those four miles with a smile plastered on our faces the entire time, sporting our Groupon Pride T-shirts and tossing out free stuff into the crowd.

Day 36 – Taste of Chicago

Taste of Chicago is a huge food festival held in Grant Park that the interns and I obviously had no choice but to attend (we really like food). The best part is that each stand offers small samples or “tastes” – so you get to try tons of different places. I know it was a successful outing since one hour later I spiraled into a food coma and passed out in my bed.

Day 38 – Last day on App Ops

(Emily working hard with fellow Chicago interns, Matt and Abby)

Day 38 was a bittersweet day. It was my last day on the App Ops teams before I would switch over to the Connection Engineering team. At this point, I had completed my project, written all the necessary tests, and even added an extra feature to the application. I wrapped up my time on App Ops with one final code review and worked through their suggested changes. I was sad to be saying goodbye to App Ops, but also excited to see what cool new work I would be doing on Connection Engineering. Being able to work on two teams is a unique opportunity I received during my internship. I’ll get to know two entirely different teams, the technologies they use, and how they operate. Really, I’ll learn twice as much and I’m excited.

I can’t wait to see where the next half of my internship will take me at Groupon!