How Google Tamed Ads on the Wild, Wild Web - New York Times

How Google Tamed Ads on the Wild, Wild Web - New York Times "Is Google holding off on image ads because of inadequate infrastructure? No, responds Ms. Mayer. She says Google uses text for ads because of cognitive science: text has the highest information density and allows users to scan a lot of information at the highest speed, or, as she phrased it, "the bit rate on text is very fast." Anything that gets in the way of speed-reading must go. Google does not permit advertisers to use all-capital letters. (Studies have shown we read those 30 percent slower than properly capitalized words.) Ms. Mayer did allow for one theoretical exception to text ads in the future: when users search for videos. "For a query on videos for baking a cake, then, a video might be best," she said."