Spray patterns

Can someone please explain how spray patterns work and how they are used ingame? Been playing for years just never heard of it till now.
Thanks

 

when you shoot more than 2/3 (sometimes 1, i think that only applies with the ak47), you get a similar spray pattern when you hold down the shooting button, its different for all guns, however the gun you're using has a similar spray pattern throughout all of its clips. You can control this spray pattern to spray and prey more effectively in a 1v1, 1v2, 1v3 situation.

 

Cool, thanks man