I think it changes who advertisers work with publishers on the Adsense site -----
*** What do Advertisers think?
I am also starting a thread to hear from the Publisher point of view
"What are content bids?"
Content bids let AdWords advertisers set one price when their ads run on search sites and a separate price when their ads run on content sites. If you find that you receive better business leads or a higher ROI from ads on content sites than on search sites (or vice versa), you can now bid more for one kind of site and less for the other. Content bids let you set the prices that are best for your own business.
You can set content bids for any campaign running on content sites in the Google Network. Content bids are set on the Ad Group level within each campaign."
The idea is sound - and overdue. Since 'the change' Content has been proving uneconomical to use. Hopefully in a few days time I'll start to feel the benefit of it. Hurrah!
Syzygy