The main focus of search engine optimization procedure is to increase the visibility of the website in respect to internet users and search engine display pages. Almost all professionals have different opinion on this single aspect because SEO is itself a very vast term encompassing a lot of things that are done every day by the webmasters all over the world. The sky is the limit with SEO so be prepared to explore this field to its fullest before arriving at any of the conclusions. If you have any other information that I have missed to include then tell please.