First of all I would say,that those,who have not been exposed before the SEO, it seems the answer to that question is mystic.But who is a search engine optimization myself more cultivated, it seems a simple thing.The thing seems difficult for those,who have already begun to optimize, but still can not see the results.
So, what do I do,to get your website and its sub-sites are Google's main page or even the first among the three.