It works like Wikipedia, meaning that you or anyone with an LFS account can edit almost any article right now by clicking on the edit link that appears at the top of the page. You can log in using the link top-right of any page. Don't be afraid to edit, you can't break the LFS Wiki. Anything can be fixed or improved later.
So go ahead, edit an article and help to improve the LFS Wiki!
If you need help understanding all the editor features, have a look at the How to edit a Wiki page