The first social networking site was Six Degrees, created in 1997. It allowed users to create profiles and list friends. Facebook is currently the most popular site with over 750 million users. Twitter has 200 million users and is used for microblogging. MySpace now has 50 million users and Flickr has 32 million users who share photos. Social networking has become integrated into everyday life through smartphone apps. Cyberbullying, sexual abuse, and privacy issues pose dangers on social networking sites.