What is poker tracker?

[pstripling]

Please forgive me if this has been discussed.

What is poker tracker. I am not very technical, if someone could explain in plain terms what this program does I would appreciate it. Also, is it easy to use, and do you find it helpful? Thanks for the time any of you take to answer this.

[CWsports]

www.pokertracker.com (http://www.pokertracker.com)

[_And1_]

" is it easy to use, and do you find it helpful? "

Easy to use? Depending on your computer and poker skills.

Helpful? If you already read a few books you might find it useful, otherwise start with books...