How do users learn about various gestures that are used on touch screens?

1. What are the gestures used on a touchscreen device?
2. What do you call the finger movements on the screen that performs an action?

What are the gestures used on a touchscreen device?

Touchscreen devices all use basic gestures like tap, swipe, and drag. Some platforms define additional gestures; for example, iOS and iPadOS support pinch and rotate.

What do you call the finger movements on the screen that performs an action?

Gesture. How to do it. Tap. Tap the screen to perform an action. Some gestures may require you to tap the screen with 1, 2 or even 3 fingers multiple times.