What’s the name for the little help bubbles some sites use

Some sites, such as Discord, show little hovering circles over UI features to new users, that they can click to learn about a feature for the first time.

After clicking once, these go away with the fact that they have been read stored as a user preference.

I have Googled all around and I can't find the right nomenclature to refer to these. I would like to look them up in order to get in a better study of them / best practices.