This chart allows you to see the organic and pay-per-click (PPC) visits to your site by search engine.
By clicking on the filters you can see solely organic visits, solely PPC visits or both organic and paid PPC visits for one search engine or all search engines.
By tracking the fluctuations in organic and paid traffic for a particular search engine over an extended period of time, you can start to establish a picture of whether or not your pay-per-click campaigns are cannibalising your natural search traffic.