Do you know 'lol' on chat ?

Hi,This is Banana.

I, Banana the GO-Player, played GO on Yahoo!Game today.

My opponent was American.

We were playing.

I, Banana, were goint to win, cause I have a little more
talent than my opponet.

He was a nice guy
because he taught me about Yahoo!Game rules, that I didn't know.
(It is not because I win that I say he was a nice guy.)

On chatting, he said 'lol'.

I didn't know 'lol' meaning.

Do you know ?

It means "Laughing Out Loud"

Its chat was happy and useful for me.

Thank you, a nice guy.

Bye-bye