The geotargeting database is a 3rd party database provided
by MaxMind.com that allow you to target ads to users based
on IP address in certain regions of the company.
For example, if you had an advertiser who ran an ice cream
shop in Charlotte, North Carolina this feature would allow
you to show their banner ad to people in Charlotte or
perhaps in North Carolina in general but show a different ad
for people visiting from the west coast.