Welcome to Wikipedia. Everyone is welcome to contribute constructively to the encyclopedia. However List of social networking websites has an established basis for inclusion. Any site listed in this article must pass the notability guidelines at WP:WEB, already have an article on Wikipedia and be primarily concerned with social networking. The article you added was removed because it was felt it didn't meet one or more of these criteria. If you disagree feel free to discuss it on the talk page. Thank you.