webweasel - 1:29 am on Jul 1, 2005 (gmt 0)

The G-- Cached Snapshot of a page found in web results will from time to time show that a search term used in the search was not found on the returned page and only found on pages linking to that page.

This is pretty clear G-- views relevant links through the search terms as provided by inbound links. Although it might not improve PR it can improve search results placement.