You are at the main page of the mobilefree.ru Wiki

Look around slowly, try “Index” or “Recent changes” link.
Use the navigation menu on the left to select a chapter.
You can also use the Wiki search.

If you have relevant permissions (look at the left bottom), you can edit/expand/create Wiki pages.
If you've never used Wiki before, try to edit playground test page first.
Read the Formatting Syntax before editing.

If you want to get an edit permissions, write here.