This is YouTube’s spin on the popular “stories” format, but designed specifically for YouTube creators sharing with their audience. This feature is available for the creators having 10k or more subs. Here’s more info: https://goo.gl/n3JfgZ
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