Cake is a proposed social network aggregator that would allow users to view updates from multiple social networks and apps in one place. It would be powered by Ethereum and allow users to monetize their own data if they choose. Some key aspects include allowing users to access their social networks from any device via a web app without installing additional apps, retaining control over their own data and identity, and getting updates even without an internet connection by using decentralized nodes run by the community. The goal is to provide a more user-friendly and private alternative to existing social platforms.