Does Google have an Adsense Crawler?

After a webpage visit, a Google crawler visits that page!

[GunnerM]

Earlier, I created an audit log for selected pages on my website. A few months ago, I added Google Adsense ads to most of my webpages. Since then, within 2 seconds of a page visit, the following Google Crawler visits that page:

crawl-66-249-66-16.googlebot.com

I checked, and that TCP/IP resolves to Google.

Has anyone else had that experience?
Why would Google do that?

GunnerM

[ncw164x]

It normally has reference to Mediapartners-Google/2.1 but hey google are always testing new things ;)

It has visited your site to check the text which is on the page, if your webpage is about bluewidgets then the adsense ads will match.

[cabowabo]

But remember, the AdSense crawler is different than GoogleBot, so getting crawled by the media bot does nothing for you in the normal index.

Cheers,

CaboWabo