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.
The report also looks at the most visible sites in organic search on Google.com. Wikipedia tops the list with a visibility score five times higher than Facebook in second place.