User blog comment:Dopp/New Profile Design Now Live Across All Wikis/@comment-3211073-20110822165806/@comment-3388044-20110822173615

Just a clarification: Edit intro in this case, is for editing section zero, that bit of an article that is ABOVE the first section, the introduction. It's also the area where, on most pages, more technical "things" are kept, like protection templates, etc. In short, it is for editing the intro section of any page.

The edit intro that daNASCAT is thinking of are created by pages in the MediaWiki namespace and, in previous editors, would appear at the top of the editing screen, as daNASCAT said. The pagenames look like this: MediaWiki:Editnotice-0, MediaWiki:Editnotice-1, …, MediaWiki:Editnotice-n