eMarketer the latest survey data found that search engine optimization services company providing the latest monitoring data for Slingshot days before the marketing staff, mainly for the United States monitoring content of the natural search results ranked first to tenth keywords click value. The results show that the top ranked keyword click rate of 18.20%, ranking second and third of the keyword click rate is respectively 10.05% and 7.22%, in other words the click rate continued to decline. Overall, very clear span of the top three keywords and click rate, in the last seven rows of the keyword click rate difference is not large, indicating that the habit of search rankings and consumer behavior on the natural search results have a larger contact.