A light weight alternative to other ip location modules with the downside of the location cookies not being available with the first page visit.
The actual cookies that are set depends on the web service that is selected on the admin page. The admin page allows you to test the service and see what cookies will be set.
Admin page: admin/config/people/location_cookie
A good use case is using the location cookie as a views contextual filter (this is what I use it for).