daemontools problem

[QBA]

Hi,

I've just installed daemontools on my linux. But I didn't find any
documentacion within it. All I know is that now I must run 'mkdir /service'.
But where should it be?  I installed daemontools in /usr/local.
And what should it contain? 
And to be honest with you I don't know what is this program about.
I thought that it is for qmail to better working but I guess I was wrong.
Could you tell me what you are using it for?
Thank you in advance,

QBA