it's just the map tag, and googles default geo location stuff. if you are logged in it'll be more accurate depending on what info they have on you
visit https://www.google.com/settings/dashboard and have a look at location settings if you want![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
you can also see the history and where you've been tracked by date as well (re android in mymcase)![Eek! :eek: :eek:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
visit https://www.google.com/settings/dashboard and have a look at location settings if you want
you can also see the history and where you've been tracked by date as well (re android in mymcase)