SEO - search engine optimising
This is based on how the search engines (Google, Bing, Yahoo, AltaVista and the rest) rank your site against similar
sites. Each search engine creates their ratings differently. The golden rule is to create interesting
content and clean code if you want their attention.
SEO work often means completely rewriting the code that a site is based on in order to obtain the optimal script.
Very often the result is fewer lines of code and a faster loading, more enjoyable web-site.