If you check the Quick Stats on the Pages or Referrers menu and then visit the Geographic menu, you will likely see fewer total visitors and views.
This happens because the Geographic dashboard only counts visitors that could have their geolocation resolved. Sometimes, a visitor’s IP address is obfuscated and cannot be mapped to a location, so while their visit is recorded, they do not have a location saved and thus aren’t reported in the Geographic menu.
For most sites, the difference will be less than 1% of visitors, but it can be higher.