email Activation

I wanted to take email activation off for my members but i can't fine an option for it, a lot of people have problems  getting into there email and don't want to make a new one. What is really the main purpose of having people do email activation?

Administration Panel > Users & Groups > Users > Users Options
Activation:

Found it thanks, i must of over looked it or miss took it for something else last i looked. 
Do you think it is important to have people activate there accounts?

No, it's nothing really important. I find it as an inconvenience for members and myself.