SEO is basically a short form of the term "Search Engine Optimization.

What is Search Engine Optimization?

Few internet users are fully aware of all that goes into the results page they view after performing a search. The complex mechanisms which govern what they see when looking for information or products is the result of two activities. The first is by search engines, like Google, who analyze each website to extract key elements used to give it a rank. This can mean the difference between popularity and obscurity, as low ranked sites are not visible on the first page of results, meaning they will get fewer visitors and less customers. From these search engine activities, the second factor of SEO, or search engine optimization developed. This is the designing of a website in such a way that makes it come out in the top returned search results, preferably the first page, when Google or other search engines are used to find information. This is achieved by various techniques such as careful placement of words and key phrases, hyperlinks, meta tags, images, links and HTML and other forms of coding.