Read the full article here @ Google Support: About top and absolute top metrics Search absolute top impression rate “Impr. (Abs. Top) %” and Search top impression rate “Impr. (Top) %” tell you the location of your ads on the Search engine result pages (SERPs). Search absolute top impression share (Search abs. top IS) and Search top impression share (Search top IS) help you understand if there is any possibility for your ads to reach the top (anywhere above the…