In line with the growing utilization of Internet network as a media business, the need for SEO is also increasing. In the top position of search results will increase the chances of a web-based marketing firm to get new customers. This opportunity is utilized a number of parties to offer search engine optimization services for companies that have a base of business on the internet.
According to Danny Sullivan, search engine optimization term was first used on July 26, 1997 by a spam message posted on Usenet. At that time the search engine algorithms is not too complex so easily manipulated.
An early version of the search algorithm is based entirely on information provided by the webmaster through the meta tags on their web site html code. Meta tags provide information about the content contained on a web page with a series of keywords (keyword). Most webmasters do manipulation by writing the keyword that does not match the actual site content, so that search engines locate and rank of those sites.
This causes search results to be inaccurate and cause losses to both search engines and Internet users who expect the relevant information and quality.
Larry Page and Sergey Brin, two Ph.D. students at Stanford University computer science, trying to overcome these problems by building BackRub, a simple search engine that relies on mathematical calculations to rank web pages. The algorithm, called PageRank, a complex mathematical function is a combination between the calculation of the number of links pointing to a web page with an analysis of the quality of each link.
Based on the principle of PageRank, in general can be said that the web pages that get high ratings is that many web pages linked to by other web pages. PageRank value will be higher if a web page that led to him also has a high quality. The value of a link from high-quality sites like DMOZ can Yahoo! or higher value than the combined value of one hundred links from low quality web sites.
BackRub is only a beginning. In 1998 Page and Brin founded Google, which is an advanced version of BackRub. In a short time Google's reputation and public trust of Internet users because it succeeded in presenting a quality search results (not manipulated), fast, and relevant. PageRank then be a good standard for other search engines as well as for webmasters who try for the website to obtain PageRank values as high as possible so that the highest position in the search results.
