An informal poll by Enid Burns at ClickZ News finds that many agencies that advertise on Google's content network have seen improved results over the past six months.
Some credit the changes Google has made to improve the network, such as placement targeting, performance reports, and new ad units on Google's search, content, and mobile networks. Google also shrank the clickable area of AdSense ads to to limit accidental clicks.
Incidentally, that shrinkage is attributed by some as the cause for ComScore's report of flat click growth for Google, among other declining click volume theories.
This fits with the trend of decreasing AdSense income being reported by publishers.
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