Online dating, long dominated by the largest sites like Match.com, eHarmony and OkCupid has been transformed in the last two years by Tinder, the mobile app that lets its users scan photos and short profiles of potential dates. It has opened up a young demographic—18-25 year olds—that the other dating sites haven’t.

It’s easier, faster and more discreet to swipe though an app than to create extensive online profiles. The downside of that is uncertainty because you don’t really know a lot about the person you are contacting. A good thing about Tinder, though, is that no one can send you a message unless you both like each other. It’s an instant filter.

Because of this simplicity, Tinder’s growth has exploded in just two years. According to the company, it processes more than one billion swipes a day and matches about 12 million people a day. A “match” means that two people agree that they are interested in each other. They can choose to either exchange messages or to meet in person.

You have to have a Facebook account to use Tinder. Most Facebook profiles are tied to real identities and real names. Tinder also shows you if you have friends in common. You set up a profile, log in using your Facebook login and then chose photos you want to use. Tinder will automatically fill in a few for you. Then you create a short bio, or leave it blank. You can set up search parameters like distance, age and gender. After that you are ready to go!