What is SEO ?

SEO is the science of customizing elements of your web site to achieve the best possible search engine ranking. That's really all there is to search engine optimization. But as simple as it sounds, don't let it fool you. Both internal and external elements of the site affect the way it is ranked in any given search engine, so all of these elements should be taken into consideration. Good SEO can be very difficult to achieve, and great SEO seems pretty well impossible at times.

SEO Stands for Search Engine Optimization.
SEO is all about optimizing a web site for Search Engines.
SEO is the process of designing and developing a web site to rank well in search engine results.
SEO is to improve the volume and quality of traffic to a web site from search engines.
SEO is a subset of search engine marketing.
SEO is the art of ranking in the search engines.
SEO is marketing by understanding how search algorithms work and what human visitors might search.
Ideally you want your site to be displayed somewhere on the first three pages of results. Most people won't look beyond the third page, if they get even that far. The fact is, it's the sites that fall on the first page of results that get the most traffic, and traffic is translated into revenue, which is the ultimate goal of search engine optimization.

Key internet marketing strategies:
Search engine optimisation (SEO) - no cost per click
Search engine marketing (SEM) - cost per click

by gvr groups