Facebook was created in 2004 by Mark Zuckerberg at Harvard for college students to connect socially. It has since expanded to over 900 million active users worldwide who use the site to share photos and videos, interact with friends, and stay informed of events. Facebook generates revenue through display advertising and had revenues of $1.18 billion in the second quarter of 2012. While the site allows users to connect and communicate, it also poses risks like information misuse, cyberbullying, and sexual predators that teachers and parents should be aware of and help students manage.