What are the usages of canvas?

Question

I know how to draw canvas elements. but I don't understand why I need to use canvas. or I don't know how it can be used in a web page.

Answer 1

Do you not want to draw graphics on a webpage? Canvas allows you to do that.

Answer 2

it helps you to put images on your webpage to make it interesting.

Answer 3

I actually don't know where and how it should use. Can anyone tell me when you use it to do what?