Question

when we use smash and shatter​

Answer 1

Smash can mean hitting something very hard, and it can mean to break something. Usually when we talk about any thing other than glass and ceramic we say smash.

Shatter is when something glass or ceramic breaks into a bunch of pieces when it was dropped or hit.

I smashed his computer after he smashed mine.

The case shattered after I dropped it on the floor.