The top five leaders in paid traffic (Google Adwords) are the same companies that lead in search, with Amazon again on top. Leading retailers don’t want to put all their eggs in one basket, and they are willing to invest heavily in pay-per-click campaigns. Clearly, PPC has worked for them because we see four out of the top five spenders are the leaders in annual sales numbers.
The term “organic traffic” is used for referring to the visitors that land on your website as a result of unpaid (“organic”) search results. Organic traffic is the opposite of paid traffic, which defines the visits generated by paid ads. Visitors who are considered organic find your website after using a search engine like Google or Bing, so they are not “referred” by any other website.