I am fairly new to affiliate marketing. As my title suggests I am considering the ability of on-site search engines. I will focus my attention on Facebook, Squidoo, Pintrest and photo sharing websites as different examples. What amount of traffic is actually picked up on these on-site search engines ? Would you say that some people might get as high as 3% of all there traffic from first time searchers to there pages ? Lets assume here everything is well SEO optimised for arguments sake. I am not sure whether this is an intelligent question or not yet with my experience. Any opinions are greatly excepted.