Retail Sites Dominate List of Most Visible Sites in Paid Search

Retail websites account for more than half of the top 20 most visible advertisers in Google paid search, according to a new report from Searchmetrics. Question answering site Ask.com actually takes top spot for paid search, with Amazon and Zappos taking second and third respectively. The findings come from a study into the top 20 most visible sites in paid search on Google.com and a similar list for the top performers in organic search.