What does search engine optimization mean?
Search engine optimization is the process that enables search engines to better identify, index, and rank your website. The primary reason for optimizing a website is to improve rankings on search engine results pages.
The SEO (Search Engine Optimisation) refers to all the techniques involved in the ranking of a website on search engines.
A Search Engine
is an online internet service allowing users to find information quickly with one or more keywords placed in a search form. The major search engines are Google of course, the world leader but also Bing, a Microsoft affiliate, Yahoo or Baidu.
A search engine works through servers called robots or crawlers that are loaded to browse the web, following the Web million links pages of millions of websites to index their content in huge databases that will be solicited during a user search. No search engine can browse all the pages in a day (this process typically takes several weeks), each engine adopts its own strategy and attempts to determine the frequency of the sites updates. Then it returns a list of results (SERP for Search Engine Result Pages) that contains links to pages with either the beginning of the text of the page or the text specified by the creator of the page with the specific tags called meta -tags, or extract the page containing the search terms.
The different responses to a specific request are then ranked in order of relevance, corresponding to specific criteria search engine, such as the percentage of words that match the search, the number of links pointing to each page, their density index ... and the pages are first selected according to their relevance to the search, and then positioned in a specific order determined by the engine's algorithm according to criteria such as positioning the confidence index (TrustRank), PageRank, the clicks in the results, the time spent, bounce rate, links ...
This is the most secret part of SEO, the algorithm is a complex mathematical formula that can be defined as follows: An algorithm is complex system of indexing the pages of the search engines that meets the criteria well individuals, combining the content and form of content on the Internet.
Indeed, with the evolution and the exponential development of websites and blogs, it has become a priority for developers to build sophisticated algorithms that best meet the needs of Internet users. There are many criteria taken into account by the algorithms of search engines, such as the age of the domain name, the bounce rate, an active presence on social networks ...