A watchlist is a page which allows any logged-in user to keep a list of "watched" pages and to generate a list of recent changes made to those pages (and their associated talk pages). In this way you can keep track of and react to what's happening to pages you have created or are otherwise interested in.
Watching a page means that the recent changes made to it will show up on your watchlist (), as will changes to its associated talk page. Actions affecting watched pages (page moves, page creations and deletions, protection) also appear in the watchlist. For example, if you watch a page that does not yet have a talk page, you will see on your watchlist when someone creates that talk page.
If a page you have watched is moved to a new title, the new title will be automatically added to your watchlist. Even if the page is later moved back (and even if the page at the new title is deleted), the new title will remain in your watchlist along with the old one. If you notice mysterious nonexistent pages appearing on your , this is the most likely explanation.
When you view Recent Changes, Enhanced Recent Changes or Related Changes, entries relating to pages you are watching appear in bold text. This means that it may be beneficial to mark pages as "watched" even if you do not intend on viewing the page.
Watching a page allows you to receive email notification of changes to it. To enable this feature, select "Email me when a page or file on my watchlist is changed" at . (Currently, it is not possible to limit email notifications by page – you will receive notification when any page on your watchlist is changed.)
You can also monitor your watchlist via RSS (RSS feed when logged in). You can also monitor your watchlist via RSS when logged out – see .
There are four ways to control which pages you have on your watchlist:
If you check "Add pages I edit to my watchlist" on , then the "Watch this page" checkbox will always be checked by default when you edit pages. Other similar options are "Add pages I create to my watchlist", "Add pages I move to my watchlist", and (for administrators) "Add pages I delete to my watchlist".
It should also be noted that:
The legend shows at the top right of the watchlist