Google has announced the additon of Read and Frequency Performance Report to AdWords advertisers panel — If you advertise using site-targeted campaigns, you know they're a great way to choose who sees your ads since you select the sites on which your ads appear. Now, with the Reach and Frequency Performance report, you can see how many users saw your site-targeted ad and how frequently they viewed them over a period of time.
The report's data is calculated by estimating the frequency of your ads from a sample group and then applying it to a full set of impressions to determine their estimated reach. Additionally, the report includes a new metric we call cost-per-head. The cost-per-head is the average cost for you to reach an individual user.
To run a Reach and Frequency Performance report, just head over to the Create Report page in the Report Center. One thing to note is that the report is currently only available for site-targeted campaigns created after January 1, 2007.
Source:→ AdWords BlogGoogle, AdWords, Site, Target, Targeting, Ads, Reach, Frequency, Report, Reporting and Analytics, Features, New Features