Quick meaning
Placing two fingers on the screen and spreading them apart to zoom in, or pinching together to zoom out.
Think of it like this
Like stretching or compressing dough — your fingers control the size.
Where you may see this
You may see this inside app stores, app settings, software updates, and install instructions.
Why it matters
Knowing the term helps you understand what an app is asking you to do before you tap, install, or change anything.
Say it simply
Pinch to Zoom means: Placing two fingers on the screen and spreading them apart to zoom in, or pinching together to zoom out.