It is likely that most search engines users will look to choose one of the top 6 suggestions in the results page, thus it is vital to take advantage of this and gain more visitors to your website and rank as higher as possible.
Good SEO practices will also improve the user experience and usability of a web site.
SEO is also beneficial for the social promotion of your web site. Once your website is found through a search engine it is more likely to be shared on social media platforms like Facebook, Twitter, Google+ etc.
It gives user’s a clear validation of the credibility of your website. Search engine user’s trust the search engines they use and to rank on the first page for the keywords the user is searching increases the web site’s trust.
SEO can put you ahead of the competition. If two web sites are selling the same product or service, the better search engine optimised web site is much more likely to have more traffic and ultimately more sales.