Our Help Center article has info which may answer your question: https://goo.gl/47zRas . Hope this help.
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
Our Help Center article has info which may answer your question: https://goo.gl/47zRas . Hope this help.