How can I overclock. PLEASE HELP

[Sengial]

Hey guys, my name is Sengial (Pronounced Sen-jie-al) and I do not know how to overclock. I don't even know where to start overclocking and I don't know anything about overclocking besides that it makes your CPU faster.
CPU: i5 3570k
CPU Cooler: CM Hyper 212 EVO
MOBO: AsRock Z77 Extreme4

 

[aqe040466]

There are a lot of videos on youtube on how to overclock your system.