What is this?
SocialWiki is where a wiki and a social network collide. Editing a page creates a new one, and so there can be many pages with the same title, organized in a tree of versions. This helps deal with edit wars. You can like a page, and you can follow a user, to help you choose among the different versions. Indeed, all page versions are available all the time, and to help choose a page for a given title, you can rank them according to various social metrics, such as the number of likes, the popularity of the users who liked the page, or the similarity of users based on their likes or follows.
SocialWiki is particularly useful for collaborative assignments, where each student is allowed to build on other students' work, without destroying it. It can also be used for group note-taking.