== How do bots work? == 

 Hello Khoikhoi. I would like to know how automatic bots work. 
 How do they catch vandalism so quick? Usually within 1 or 2 seconds. 
 I have noticed that when I was catching vandalism myself on the Recent Changes. 
 Usually the bots beat me before I warn the vandal. 
 But I have noticed also that they only catch vandalism that has large sections of the page missing. 
 They don't catch small minor vandalism or page move vandalism. Why is that? 
 I think there should be bots that block vandals. That should save us a lot of work. Don't you think? 
 But how do the bots work anyway?