You mean piwik? if it is available with some hosting plans than all you have to do is open that application from a control panel you would have, otherwise just upload and extract the package you can download from the official site into a directory of you website and follow the step by step installation
It's installed on the directory. However, I need a way to integrate it with WordPress (if it will do the job). For instance, what page do I put the code? Of course, you will say put it on the page you want to track. However, I noticed some visitor tracking programs won't work with WordPress or the perhaps the newer versions of WordPress.