Basic conscept of Search engine optimization (SEO)

[pstpl1]

the process of improving the visibility of a website or a web page in search engines using the natural or un-paid search results. In general more frequently a site appears in the search results list, the more visitors it will receive from the search engine's users.
SEO [nofollow] may target different kinds of search, including image search, local search, video search, academic search, news search and industry-specific vertical search engines.

[Mike Nielson]

SEO is a process in which we optimize a web page over a search engine for a a specifics set of keywords.In the other words we can say that SEO is a practice which helps search engines find and rank your site higher than the millions of other sites in response to a search query.

[colin214]

Search Engine Optimization or Search Engine Optimization is process of improving the visibility of a website or, a web page in search engines.
1.Online Search Engine Optimization.
2.Offline Search Engine Optimization.
In the online Search Engine Optimization we links our site in the coding of a website, And in Offline Search Engine Optimization we work separately from the web site.
There are basic concept which are used in offline:
Directory Submission
Blog Submission
Article Submission
Forum Posting
Press Relies etc

[RafaelJames]

SEO is a technique of improving the visibility of a website or a web page in search engines result pages. If you want to promote websites then there are two type of seo one is on  page and the other is Off page seo. You can generate with the help of Of page SEO techniques like forum posting, article submission, profile submission, social bookmarking and guest posting also.

[davidfleming]

Search engine optimization is a methodology of strategies, methods and tactics used to enhance the amount of visitors to a website by obtaining a high-ranking placement in the search results page of a search engine (SERP) -- including Google, Bing, Yahoo and other search engines.