We've background play feature along with audio-only mode, ad-free and more are part of YouTube Music Premium which is a paid subscription. Here's more info: https://yt.be/help/1KU6 . Hope this helps.
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
We've background play feature along with audio-only mode, ad-free and more are part of YouTube Music Premium which is a paid subscription. Here's more info: https://yt.be/help/1KU6 . Hope this helps.