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.