Search engine optimization (SEO) is the perform of maximizing the amount or fineness of traffic to a web site (such as a blog) from search engines via "normal" or un-paid ("organic" or "algorithmic") search results as opposite to other forms of search engine marketing ("SEM") which may deal with paid addition. The theory is that the previous (or higher) a site appears in the search results list, the additional visitors it will take delivery of from the search engine. SEO may target unlike kinds of search, including image search, local search, video search and industry-specific vertical search engines. This gives a web site web presence.
As an Internet marketing strategy, SEO consider how search engines work and what people search for. Optimizing a website first and foremost involves editing its content and HTML and associated coding to both increase its relevance to specific keywords and to take away barriers to the indexing activities of search engines.
The acronym "SEO" can refer to "search engine optimizers," a term adopt by an industry of consultants who carry out optimization projects on behalf of clients, and by employees who perform SEO services in-house. Search engine optimizers may proffer SEO as a stand-alone service or as a part of a broader marketing campaign. Because effectual SEO may need change to the HTML source code of a site, SEO tactics may be included into web site development and design. The term "search engine friendly" may be used to describe web site designs, menus, content management systems, images, videos, shopping carts, and other rudiments that have been optimized for the purpose of search engine exposure.
Another class of techniques, recognized as black hat SEO or spamdexing, uses method such as link farms, keyword stuffing and article spinning that humiliate both the relevance of search results and the user-experience of search engines. Search engines look for sites that employ these techniques in order to take away them from their indices.