From Wikigogy

This is a User feature

Your watched pages

• are bold when listed in Recent change (for you only).
• are listed on your my watchlist page -- link at top right next to my preferences.

To watch a page, click its watch tab at the top of it. It is the rightmost of the tabs at the top left of a page.

To unwatch a page, click its unwatch tab (same place where watch tab was, rightmost tab top left of page).