Simple question I cannot find an answer to:
Where and how does facebook get the data for the number of people who "have been" to a place?
Is it all GPS / mobile data?
If you live in a certain location does this contribute to the "been here" number?
It seems the number correspends rather well for cities.
EG https://www.facebook.com/pages/Sofia-Bulgaria/106013482772674 Sofia has about 2m Citizens, and 1,8m "people have been here".