I'm showing an average of 60-80 visits a day at LWDF, yet Google Adsense is only showing 10 impressions for the day?? It's been like that for the last couple days with a few of my sites. Awstats shows my normal amount of traffic, yet Adsense is showing a tenth of the impressions I normally get.
Could it be that adsense ads failed to show on your site frequently for some reason such that the page impressions were there but not the ad impresssions? Also do you have alternate ads option set up?
Adsense will only count impression's for those it will show. I get around 5k~15k total ad unit impression's a day, but adsense only counts around 500~2k of those advertisments.
On your Reports page, Show data by switch it to ad unit and it should show you the number of ad units shown on your pages. The default is to show you the page number that adsense has shown advertisments on.
For instance I have shown 2,592 advertisments on my site and adsense reports me showing 800.
Anyhow, setup advertisments to show in the PSA place aka when google has not advertisments to show. You can link to a .php file and then use that file to include something that will rotate different advertiments and also keep a count of how many times google is not showing advertiments on your site. Keep in mind if you do keep a count it will be ad units and not the default pages like google usually does. Might want to put a check in the php to make sure it was a different page that was loaded when counting it.
The strange thing is: up til the last couple days, I'd get like 80 visits and Adsense would show at least 40-50 impressions.. now it's showing like 10 for the same number of visits. Anyway, I wrote them to see if they could clarify for me. Thanks!
This Is Weird! 
