Tabbed pages are a useful feature that allows you to easily switch back and forth from one page or posting to another by simply clicking on the tabs at the top. This way you don't have to click the "Back" button on your browser (or open other browser windows) and risk losing previous viewed pages.

In the case when you want to quickly refer to other postings while searching, or composing a posting, you can just look along the top of the window and you'll see a tab with page name on it. Just click on the tabs headers to switch between pages.