Fortnite, what is lasers?

I often hear from my mates: "why does he do lasers?!". I would like to ask my mates what it means but am afraid. To be made so stupid because I don't know That's why I wanted to ask you, what does laser mean?

Laser is an acronym and means: "Light amplification by stimulated emitation of radiation".

But that won't help you any further…

This means that the opponent will do him a lot of damage, e.g. If you get several headshots with the Ar.