An "info page" is a type of subpage for an individual's page, allowing time-saving in later displays of that page and of relatives' pages and family trees and queries.
Info pages were superseded in 2009 by Semantic MediaWiki. Most info pages were used for automatic creation of new-style "facts pages". Whenever an info page can be seen to have all of its data transferred in that way, it can be deleted.
See Familypedia:Info pages for residual explanations.