Farming

Can anyone tell me what farming is? And is there any working *Farming* bots? Cuz I heard farming gets you easy exp.

Farming is when you set up a room with AFK accounts, and you just kill them all with your main account to gain EXP.
Possibly there are working Farming Bots Hack but they are not sharing it.
Or you can buy multiple laptops to Farm.

So how would you farm? Just get more then one pc?