Along with this @guardian article, a regular reminder to follow @aral if you're not already and have an interest in a more egalitarian internet. 
https://twitter.com/johnharris1969/status/958974110108971008 …
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more