Do not worry, nothing will be published to your Facebook profile. In fact, it is not a site but a smartphone application, built around a particularly efficient concept where the geolocalisation is key.
The idea is to provide a fun way for users to meet others within a specified distance, from a few meters up to a hundred kilometers, men or women.
Tinder attempts to simplify the user experience and is concentrated mainly around your profile pictures.
For this purpose, it allows its users ( mostly people in their 20s) to rate photos and profiles of other Tinder users within a radius uo to fifty miles around.
What makes Tinder unique is that it matches you only with people you like and they have to like you back in order to get in touch.