Feedburner? apa tu???

Hey~

its a bit personal here
but I was wondering
what is a feedburner?

you see..
I'm still new in this world
and i don't really know
how things work.
apart from wiki,
and feedburner itself
which I've just registered..
I still don't understand how
they work

could someone kindly
explain it to me?
or maybe give me any URL
regarding this.
RSS? Atom?
whats that?