Every one looks forward to obtain more and more visitors to their sites. So they try in a lot of techniques to get them. Also, there are a lot of sources of one’s visitors and mostly the main source that we are familiar with is from search engines. Now you may ask the question what a defensible visitors is. It’s nothing but all the visitors you get from various places minus that which you get from search engines. That is, the visitors from sources other than search engines like Google, Yahoo, MSN, etc is known as defensible traffic.