Banner ads are
advertisements that many
web-sites use to
flash their
visitors with. These are small images that are placed at
top/
bottom/
middle of
web-pages. Usually they come
annoying to visitors, but it is these advertisements that act as
source for
funds for many
free sites.
Banner ads can be useful though, you come to know about new sites, new products from the banner ads, and that was one of the reasons to How I came to know about Everything2.