What are the Highest CTR Mobile and Desktop Display Ad Sizes?

For a marketer, paid ads have always been a reliable source of customer acquisition. While the way companies use paid advertising can vary — some use ads for retargeting, some for brand awareness, and some for acquisition itself — every one of us has to get involved in it in some way.  And, because of banner blindness/ad blindness, it’s not easy to capture the attention of the users with display ads and then get them