Search engine optimization (SEO) is the process of affecting the online visibility
of a website or a web page in a web search engine's unpaid results often referred
to as natural, organic, or earned results.
SEO is the practice of increasing the quantity and quality of traffic to your website through organic search engine results.
In general, the earlier (or higher ranked on the search results page), and more frequently a website appears in the search results list, the more visitors it will receive from the search engine's users; these visitors can then be converted into customers.