ShiftOut Help

Could someone please give me some information on the use of the shiftOut() command and how it is used. I am using it to run an RGB LED matrix using a TLC5947 or some '595s.

/me

Did you see this?

Yes, I'm still slightly confused.

/me

I've used the shiftOut tutorial to make a decent setup with two 74HC595s so I have a some experience with how it works...what exactly confuses you as I failed my ESP class! ;D