4-ad blocks increase in %
According to Moz, 4-ads only accounted for 1% of SERPs top ads. However, last week there was a huge increase in the percentage of top ad blocks that displayed 4 ads as it jumped up to 19.3%.
4-ads have now overtaken 2-ads, accounting for nearly one fifth of all the top ad blocks. Moz say due to the huge increase in percentage, it’s unlikely that 4-ad blocks are still in testing.