After 85 posts in this forum now you are asking about seo and sem that is wonder in it self that you really want to know yet about SEO/SEM.LOL!!
I know only about back links. I am asking about SEO and SEM. according to me and other SEO professional only most back link is not SEO, it's spamming. it's not matter of laughing . I watch your site it;s have good ranking...keep it up.. after what doing your site's PR is 5.
Search Engine Optimization is an organic process of Internet Marketing Search Engine Marketing is paid sponsored process of Internet Marketing involves pure Money