Can anyone explain why I have say 15000 page impressions in Awstats however obnly 3000 banner impressions in Google reports, am I missing something? I have adsense on every page of my site...
Several reasons that I can think of... Awstats is on the server, so it can actually track every view. However, some visitors may have Javascript disabled, AdSense blocked, or leave the page before AdSense loads (or AdSense may just fail to load). Bots in particular contribute a lot to this. Also - I'm not sure whether Awstats does this but some tracking does - images, stylesheets, included files, framed files, etc., may be counted as another view, despite not causing another AdSense page impression. You might be getting some PSAs (public service announcements). That's what I can think of off hand.