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Just under a month ago, Google released a really large ad format - 300x600. The new ad format, as Google said, is "brand friendly" and is also typically called a half page unit.
What started happening was that publishers started putting up to three of these ad units on their pages, leaving virtually no room for content.
So Google announced a change in policy to just allow one of the 300x600 ad units on a page at a time. You can have up to three ad units on a page, but only one 300x600 unit is allowed on the page.
If you added multiple, you have until January 10, 2013 to remove it.
Google wrote:
Because this new format is larger than all our other ad units, we want to help ensure a balance between content and ads across publisher sites. With this in mind, going forward, publishers will be permitted to place a maximum of one 300x600 ad unit on each page. If you've placed more than one 300x600 ad unit per page on your site, we ask that you remove any additional ad units by Jan 10, 2013. We'll also be sending email notifications shortly to affected publishers, asking them to make this update.
Forum discussion at WebmasterWorld.
Comments:
Brandon
12/12/2012 04:43 pm
Do you have a picture or an example of three of these ad units jammed up next to each other, as you described? I'm very curious to see what this looks like.
XeBii Mj
12/12/2012 08:54 pm
This ad unit does not load on my blogs
Guest
12/13/2012 08:40 am
Oh shit!! I have to change fro all my blog.
Masudur Rashid
12/13/2012 08:45 am
Oh... I have to change all of adsense code in my blogs..
ZEN
12/17/2012 09:29 am
This is the great news for Adsense publishers! I have just use this size ad unit on my blog/ Check how it works: http://www.technewsdaily.info/2012/12/the-new-usage-of-300x600-ad-format.html
ZEN
12/17/2012 09:33 am
You can check out here: http://www.technewsdaily.info/2012/12/the-new-usage-of-300x600-ad-format.html
Arun
04/11/2013 04:59 pm
Webmasters can easily get carried away thinking that two big ads can increase dollars. But the reality is that would actually make the site seem less authentic and an ad-intensive blog. One 300x600 ad is sufficient to boost clicks by 5x times. Here's living proof - http://www.skipser.com/508 I got a reduced CPC, but the clicks were enough to make the total income more than what was earlier.