On the Groupon website, click the Coupons link on the top navigation bar. Afterward, enter the name of the store you would like to find coupons for in the Search coupon by store or category box.
Let's pretend I'm on one of my many Nine West deal hunts. They happen to have a regular online store and an outlet store, so I choose the type of store I want. For the online store, I would select that option and scroll down until I find a coupon I like. The thing about Nine West is many of their coupon offers are automatically applied at checkout.
The benefit of Groupon in this case is it is alerting me to a sale, so if I did not receive or never signed up for the store's emails, I'm not missing out. Groupon also offers direct links to sign up for email lists if you choose, and those codes can be used in conjunction with sales on the website.
So, next time you get ready to shop online, don't forget to visit Groupon Coupons first. You may find a deal that helps you shop, guilt free!