Awstats est a libre software. More information will be found on its official website.
As a summary, Awstats' statistics are allowing you to analyse a bit your website and your downloads' repositories .
Ths statistics are updated once a day around midnight.
The awstats files are located in ~/YOURGROUP/YOURWEBSITE-web/awstats/
If statistics don't show up, they could be blocked by your anti-ads plugin, such as Adblock, in case of Firefox.
Migrate your datas
See : Transfer statistics.