Text ads have proven to be a great way to help advertisers extend their Google search campaigns to sites in the Google Display Network, enabling publishers like you to earn revenue from your content. This is why we’re continuing to work on improving text ads, even as we introduce new ad formats.
One change, rolling out this week, will make the look and feel of text ads more consistent as consumers and advertisers use screens interchangeably, and distinctions between devices fade. You’ll notice a new clickable arrow icon, as well as slight optimizations to font size, spacing and text layout.
These enhancements are among the largest that we have made to text ads, and our experiments indicate an uplift in clicks across publishers on the Google Display Network.
These changes will happen automatically for most text ads on your pages, and the color of the arrow icon will be based on the color palette you’ve selected for your ad units. For instance, if the background of your ad units is white, the icon will be grey; for other background colors, the icons will be a different shade of the background color. Consistent with our program policies, we ask that publishers refrain from mimicking these arrows or placing similar images around their ad units. Below are some example of this new text ad format in the 200×200 and 300×250 ad unit sizes.
via Enhancing text ads on the Google Display Network – Inside AdSense.