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Using any popular crawler-based search engines can help in searching for any topic. In an instant, millions of pages are sorted by search engines and the matching topic search is presented. The matches will then be ranked according to the order of relevance.

Sometimes, the right search is not obtained by the search engines . Pages with no relevance are searched and thorough search may enable the visitor to locate the information needed.

So, how do crawler-based search engines determine the most relevant topic when faced with hundreds of millions of web pages to browse? They are bounded by a set of rules, known as an algorithm. The functioning of a specific search engine is a their own business. However, all major search engines are guided by the following general rules.

One of the the primary rules in a ranking algorithm has something to do with the location and frequency of keywords on a web page.
Search engines will also search to find out if search keywords appear near the top of a web page. Search engines assume that relevant pages mentions keywords at the onset.

The other important factor in the determination of relevance is frequency. The number of appearance of keywords related to other words in a web pages is analyzed and evaluated. The more frequent the words appear, more relevance is given.

More web pages are indexed by some search engines compared to others. As a result, no search engine has exactly the same web pages collection to browse through. There is a natural difference produced in terms of result comparison.

Likewise, search engines offer penalties to pages or index exclusion , if search engine “spamming” is detected. For instance, when a word appears a hundred times on a page, thereby increasing the frequency and improving the ranking in the listing. Different ways are utilized by search engines to detect common spamming methods , such as complaint follow-up from users.

Webmasters do not easily influence off the page factors. Among the principal factors is link analysis. By evaluating the manner pages are linked to each other, the content of the page and the importance of that page can be determined by search engines thereby improving its chances for being ranked higher. Aside from that, sophisticated techniques are utilized to analyze attempts by webmasters to create “artificial” links intended to increase their rankings.

Clickthrough measurement is another off the page factor. This means search results may be monitored by a search engine , then eventually demote high-ranking pages do not attract many visitors and improve the ranking of pages ranked lower that attract more visitors. Just like link analysis, systems are employed to balance for artificial links developed by anxious webmasters.