If I read this right, you can now target advertiser ads to particular pages or individual ad units.

Sounds like an improvement to me!

From the Inside Adsense Team:

We wanted to let you know about two recent changes to oursite targeting feature.

As you may know, site targeting allowsadvertisers to select specific publisher sites on which to run their ads. Advertisers can target your site if they’ve determined a match between their offerings and the interests of visitors to your site.

The first change isthat we’ve renamed ’site targeting’ to ‘placement targeting’ to better reflect
the variety of targeting options we offer. Advertisers can still target theirads to an entire site, but they can now also target your individual ad units orgroups of pages based on how you’ve set up ad placements using custom channels.

Over the next few weeks, we’ll be updating references to ’sitetargeting’ in your account and in our Help Center.The second change is thatadvertisers can bid on placement-targeted ads (formerly known as site-targetedads) on a cost-per-click (CPC) basis.

Previously, advertisers could onlybid on these targeted ads on a cost-per-impression (CPM) basis. Just as withcontextually targeted CPC ads, you’ll generate earnings for valid clicks on placement-targeted CPC ads.

While you can also add the URLs of specificCPC placement-targeted ads to your filter list, please keep in mind that allplacement-targeted ads will participate in the ad auction with contextually
targeted ads. Allowing more ads into the auction will help increase competition and ultimately your revenue.

Finally, we’d like to leave you with a few reminders to help you maximize your revenue potential with placement targeting:

• placements will allow you to highlight specific sections of your site that may
  appeal to advertisers.
• Enable text and image ads for your ad units. By opting in to different ad types on your site, you’ll increase the competition in the ad auction, which can lead to additional revenue for your account over time.
  
• Use the 300×250 Medium Rectangle. This ad format is one of our best-performing ad units, and many advertisers use it when creating rich media (image and video) campaigns. Again, you’ll benefit from the increased competition for your ad space.

Turn your custom channels into ad placements. These ad

By Arlene Lee and Katie Mandel - AdSense Publisher
Support/Product Marketing
Posted By Inside AdSense Team to Inside AdSense
at 11/12/2007 05:40:00 PM