Forget About t

I guess when we dont care about something we say "forget about it".

If someone makes an error and they apologise, you can say forget about it. if it is not that important. 

forget about it

ı gess when we dont care___something we say "forget about it".

I guess when we don't care about something we say "forget about it"

In English u always "care about" smth.

forget about it

Iı gess guess/(I think) when we don't care something we say "forget about it/(forget it).