Google has announced that they are rolling out a brand new ad unit on their AdSense platform. This unit is of size 300×600 pixels and is already widely used by publishers around the world.
The company said:
The 300×600 unit, sometimes referred to as a half page unit, provides a larger space for advertisers to get their message across and can offer users rich engagement. As mentioned in our recently released Display Business Trends, the 300×600 is one of the fastest growing sizes by impressions and is indicative of a trend where publishers are offering more visually impactful ad sizes that are preferred by brand advertisers. Because this unit is new to our network, you’ll currently see a large number of text ads in these placements. Over time we’ll continue to build a wide range of text and display ad inventory eligible to appear in this full slot as well.