Can someone explain the scratch WIki to me? I'm not really sure, is it just explaining the features of scratch? Or does it have pages of scratchers too because I've heard some people say they have their own profile on scratch wiki. Lastly, how do you become one of the people that edits the scratch wiki?

From the Scratch Wiki's about page:

The Scratch Wiki is a collaboratively written wiki available for free that provides information about the Scratch programming language, its website, history and phenomena surrounding it. The wiki is supported by the international Scratch Wiki community, and is mainly edited by Scratchers. The Scratch Wiki is a popular source of information for the website, program, and tutorials, and it continues to grow as Scratchers use it as their primary source of information. The Wiki also includes advanced articles for Scratchers around the world to build, share and see.

You can read the requirements for becoming a wiki contributor at this link.

The Scratch Wiki explains the features of Scratch as a site and as a coding language but it also includes tutorials. User profiles on the wiki aren't pages documenting Scratch users, they're the personal profiles for users of the wiki, kinda like how we all have our own profiles on Scratch. You can join as an editor by following the instructions on this page

edit: someone beat me to it, oh well

Thank you!