For example, when I land on a screen, a sort of 'tooltip' may appear suggesting me to do or discover something, and after a couple of seconds, it fades away automatically (same animation as the notifications on Instagram, when the 'tooltip' fades away and it remains only a red dot in the tab bar; of course in the case I am describing above I am not talking about notifications, so there's nothing left after the teaching purpose of the 'tooltip' has been fulfilled).Image credit by Greg Wilkinson
How is this 'tooltip'/panel/suggestion technically called so I can refer to it in a proper way within my team?
Sometimes a hint comes in form of animation: I recall downloading an app with a message system inside, and the first time I saw the list of the various inbox messages, the first line swiped on its own on the right and on the left, allowing me to see that if I'd do the gesture myself, I could interact with hidden drawers (like in iOS) such as "delete" "flag" "read" and other things. With my big surprise a lot of iOS users I know don't know about these features, so I found the animation on this app (which I can't remember the name) pretty clever.
How can I call these "behaviour teaching" animation in a proper way?
I've searched here https://developer.apple.com/ios/human-interface-guidelines/interaction/3d-touch/ and online more in general, but I didn't find anything that applies.