Jaideemaak - 3:25 pm on Jun 21, 2011 (gmt 0)
I received an e-mail recently advising me to turn on images and text but I can't remember if it was labelled urgent.
I had recently turned on images and text for all but one ad unit and the e-mail highlighted the one ad unit in question. The bods at Google seem very keen for publishers to have all options open. I followed their advice.
For the last couple of months I've been doing some long-term testing on text and image ads. By this, I mean making a change and leaving it for a whole month instead of reverting the change as soon as things start to look bad.
The stats in the new interface tell me that image ads get very few clicks; it therefore seems better to turn them off. I ran this way for a month.
However, when I turned both text and image ads back on, my CTR went down but my earnings went up. This seems to be in line with Google's explanation that when you have both turned on there is more competition in the auction and therefore the value of clicks goes up.
AdSense is such a complete mystery to me that I have given up trying to improve anything myself by messing around with the publisher options. All ad blocks are now set for images and text, and I've cleared out my competitive filter list.
I have done a lot of messing around in the past trying to improve things but nothing ever worked. Google has complete control now over which ads are served and I have to admit that my earnings have never been better.
March 2011 was a record month, May 2011 was pretty close, and June 2011 should be a new record again.