SEO
Webmasters and content providers began optimizing websites for search engines in the mid-1990s, when the first search engines were cataloging the early Web. First, a webmaster needs all, it was a page or URL, to the various motors, which would send a spider to crawl the page, extract links to other sites, and return information can be found on the index page. The process includes a search engine spider download and save a page on the search engine’s own server, where a second program, known as indexing, extracts information on the different side, as it contains the words and where are they, as well as no Weight for certain words and all links in the page, then in a scheduler for crawling at a later date.
Web-site owners to recognize the value of sites, their place and very visible in search engine results. According to industry analyst Danny Sullivan, the earliest known use of the term search engine optimization was a spam message posted on Usenet, 26 July 1997.
Early versions of search algorithms on webmaster information as the keyword meta tag or index files in the engines as ALIWEB. Meta tags, a guide to the contents of each page. But with meta-data to index pages, we found that less than reliable because some webmasters abused meta tags by irrelevant keywords to increase artificially page impressions for their websites and to increase their advertising revenue. Cost per thousand impressions for the time the joint help of content sites money. Incorrect, incomplete and inconsistent data in the meta-meta tags caused pages to rank for irrelevant searches, and not for relevant searches rank. Web content providers manipulated a number of attributes in the HTML source code of a page in an attempt to rank well in search engines.
By itself so much on factors entirely within a webmaster’s early search engines suffered from abuse and manipulation ranking. In order to achieve better results for their users, search engines had to adapt to their results pages showed the most relevant search results, but as independent pages filled with numerous keywords to unscrupulous webmaster. Search engines responded by developing complex algorithms taking into account additional factors, the webmaster difficult to manipulate.
Ph.D. students at Stanford University, Larry Page and Sergey Brin developed backrub, a search engine, based on a mathematical algorithm, in order to assess the importance of Web pages. The number calculated by the algorithm, PageRank, is a function of the number and strength of inbound links. PageRank estimates the probability that a particular page is achieved through a Web-based user interface, which coincidentally or surfing the Internet, and follows links from one page to another. In practice, this means that some links are stronger than others, as a higher PageRank is rather achieved by the random surfers.
Page and Brin founded Google in 1998. Google has a loyal following among the growing number of Internet users who enjoy their simple construction. Off-page factors such as PageRank and link analysis, as well as to the factors site for Google to avoid the kind of manipulation seen in search engines, the only on-page factors for the ranking. Although PageRank was harder to play, had already developed Webmaster link building tools and systems to influence the search engine Inktomi, and these methods proved to be also for the collection PageRank. Many sites are focused on the exchange, buying and selling of links, often on a massive scale. Some of these programs, or link farms, the creation of thousands of Web sites for the sole purpose of the link-spamming.
To reduce the impact of link programs, which are from 2007, search engines, a broad range of factors for their silent ranking algorithms. Google says that the series of sites with more than 200 different signals. The three leading search engine, Google, Yahoo and Microsoft’s Live Search, not the algorithms to rank pages. Notable SEOs, have different approaches to the search engine optimization and have published their opinions in online forums and blogs. SEO practitioners Patents can also study the various search engines to gain insight into the algorithms.
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