Bookmarks let you easily keep track of pages you think are interesting.
You have no Bookmarks. To add a page click "Bookmark this page" at the bottom of the page.
Bolded items have been modified since you last viewed them. Clicking changes will show you the differences between the version of the page you last saw and the current version. Bookmarks are great for easily watching pages. To bookmark a page, simply visit the page and click the 'bookmark' link at the bottom of the page.