Google Adsense Policy Update
Now you can place up to three link units on a page. As we’ve noted in the past, link units are a great way to provide relevant, user-friendly ads in hard-to-fit locations on your site.
Read : Official Adsense Blog
Google Search Box Reduce CTR
I’ve been toying around with Google Adsense Search on my other blogs and concluded that by using Google Search, a blog’s Google Adsense CTR could be greatly reduced by 1%, I’ve done some experiment for the past few months between February and April, and the blog that I experimented on has a drop of in CTR for that month which translate into a drop of earning in term of dollars, for your information, traffic to my blog increases every month.
The CTR went back normal again when I remove the Google Search Box, my best guess would be the possiblity a visitor exit my blog by searching something with the Google Search Box, where else if there is no Google Search Box, the visitors are much more likely to exit my blog my clicking on one of the external links. I’ll re-introduce the Google Search Box again in my other blog and will see how it performance again this coming month, hopefully my theory is right.
