SEO (Search engine optimization) is the method of optimizing your website on search engines. Search engine work on algorithms to list a website on their search results. Definitely it’s a legal way to do promotions on internet. For that, you have to hire a good firm who is working according to the norms and guidelines of search engines. If you simply begin a search on the internet, you will come across thousands of SEO firms, but only some of them like LinkShake and WebiMax have maintained their great reputation in this field.