We've seen many people asking the same question again and again that "Why Text & Display is the best performing AdSense Ad Type?". As Display ads are more attractive in comparison to plain text-based ads then why 'Text & Display' ads?
Actually, the secret to having highest bids on your inventory is by creating pressure within the auction. But how?
As Google also recommends, it is advisable to use "Text & Display ad" type. Text Ads include a title that is a clickable link to a webpage, one or two lines of text and a website address. Display Ads includes all image, flash, video and expandable ads. In the ad auction, there are plenty of display ads and text ads.
Text & Display: The Best Performing AdSense Ad Type
If you choose to serve only one ad type or the other, you are leaving an entire category of ads out of the auction. The more bids competing for your inventory, the greatest the highest bids are likely to be.
So by enabling both Text & Display ads, you will help create pressure within the auction. This allows you to serve the most valuable advertisement available for your site, regardless of format.