Can you explain what is keyframes animation and how are they use? When ?and so on .

Question

I understand keyframes animation and what we can do <div> I mean that I can make <div> whatever I want? Star,tree,any shape.

Answer 1

basically keyframes are the stills or anchors of an animation, and all the other frames in between are actually the animation.
https://lmgtfy.com/?q=keyframes&s=t