Facebook's success stemmed from its emphasis on real identity and the ability for users to share their content, which was missing from other platforms at the time.

Platforms like Facebook initially thrived on real identities, fostering trust among users, which contributed to their growth.

Myspace could have survived if it had focused on the fundamental need for social connection rather than trying to copy Facebook.

I realized that before Facebook, the internet had a lot of information but lacked a focus on real identity and connections between people.

Facebook's success was partly due to its high trust and real identity, which was established by starting in colleges where users felt safe sharing personal information.

FriendFeed generated a lot of buzz but struggled to grow because we competed with Facebook, which became a formidable competitor.

Friendster calculated the degrees of separation for users in real-time, which caused performance issues, while MySpace simplified this by stating whether someone was in your friends list or extended network, demonstrating a 'do things that don't scale' approach.

Facebook understood that the most important feature of a social network is having your friends there, which creates a tension between individual and network needs.

When I joined Google, I believed in its mission to provide the world with information, and at Facebook, I saw the potential for real identity on the Internet.