The algorithm that was established checked the quantity and strength of inbound links on the website. Besides Google other search engines have also put up ways to stop spamming of links and pages putting up unrelated search terms. When the site owners started seeing benefits of having a higher page ranking they began finding ways to improve their site ranking bringing about white hat and grey hat practitioners. A need for search accuracy is therefore need in order to make it preferential as compared to the other web search engines offering their services.Larry Page and Sergey Brin, founders of Google, developed 'Backrub' which was a search engine that solely relied on mathematical algorithm to rank website and web pages.

There are a variety of search engines available but the most used search engines are Google, Yahoo and Bing. It was quite simple because the spider used to download page while the indexer on the other hand would extract all the relevant site information. The high rise in number of websites has brought about a struggle in reaching the online market thus giving rise to SEO Engineers; these individuals usually try and affect the visibility or presence of websites in the search engine websites so as to create a comprehensive strategy that will ensure the site is seen by many people. The leading web search engines as part of a protective mechanism opted not to disclose their algorithms so as to ensure ways are not found to alter site page ranking.

The search engines had to find a solution to stop this feebleness so they came up with changes in the algorithm that included additional factors that were much more complex and difficult for webmasters to manipulate. The daily advancement in technology has however been a hindrance to the accuracy of these search engines since the SEO engineers have found that by using iframes, flash and javascript page rank sculpting can be performed. SEO began in the mid-1990s and back then all the webmasters did was submit web addresses to search engines which would then send a 'spider' to 'crawl' the website or webpage and extract the relevant information that would in turn be indexed.ea888 timing chain kit Due to the accuracy of the page rank system link spamming was introduced this was establishing link farms whereby thousands of sites were created by the webmasters and SEO engineers.

White hat is acceptable measures taken to improve the site rating while grey hat is the unscrupulous ways by which a site rating can be enhanced some of those ways can be linking unrelated terms to the site thereby online users opening site opening websites that are not related to their searches. These algorithms used site keyword density as part of their ranking criteria so as part of SEO the webmaster kinked many unrelated search terms to their web pages and websites. HTML of the sites was also altered so that the sites could ultimately rank well in SERPS. SEO may be a good way to increase site rating but the lengths at which webmasters have gone to so have ended up making the search engines seem incompetent. As a result website found to be violating the web search engines may be removed or warned. Since 2005 Google has been analyzing user searches so that web searches can be personalized rather than the page ranking methods being used