Google analystics is an analysis package with wide function range.

Hereby you get indicated, how visitors has found your website and how they moved on it. Whereby you get a market research and so you can optimise your number of attendees.

In a google analytics account in over 80 reports the visitors are seized on your website and the achievement of your advertising campaigns are observed. With these informations you expert, on which place your visitors leave the web page, which display text has the best effect and which keywords work excellent.

And the best, google analytics is free!

Additionally you can integrate it in AdWords (which is a form of internet advertisement) .