Develop your site's performance

I own as many as 17 sites and I would like to tell you that my full time profession is earning through blogging. One can easily make $1200 every month with so many numbers of sites that one owns. It is very important to ensure a good performance in the search engines to ensure that the revenue and sales that I make is good enough to get a reasonable income to my pocket. I have been trying hard to find the best way to optimize my site’s performance in all the search engines, I mean the major ones. It is not quiet possible that one could have better site performance with out unique content been posted. One of my friends suggested me to try search engine optimization company which ensures that your site performs in the best possible way in search engines, major ones. I would this cool optimization company 10 out of 10, as my monthly revenue has improved by 15% because of them.