subject: Web Crawlers: An Integral Component of Search Engines [print this page] Author: Article Manager Author: Article Manager
When you website is indexed and the search engines discover your website either from a submission or through some incoming links, it sends the crawlers also known as search engine spiders to catalog all the pages of your website. The crawlers are basically algorithms that visits your site, reads the titles, Meta tags, contents and links that are related to your site. After gathering the information about the particular site, it sends the information to a central depository and the data is indexed so that it can be used later on for quick access. Sometimes, only a limited number of pages per website can be indexed and if you want the entire site to be indexed, it is better to keep your site small.
How do the Crawlers Work?
Various methods are used by the search engines to determine the ranking of a site. Some lay great emphasis on the anchor text and incoming links and some give importance to the location and frequency of the keywords. By finding out the popular words used by the people to link to your site, the crawlers conclude what your site is all about and the search terms for which the site can rank high. Proper understanding of the algorithms used by the search engines to index the pages is important as it helps to select the best optimizing techniques for higher ranking. The method of crawling is similar to a person reading a book. First the reader finds out the topic of the book and then goes through the title or summary of the book. Next he examines the chapters and the headlines and the content of the book. While creating a website these things are to be kept in mind so that the crawlers find it easy to gather the information about the website.
A web crawler is an automated script or program that is designed to browse the pages available on the net in an automated and methodical manner so that an index can be created based on the information that the searchers are looking for. In fact the effectiveness of a search engine depends on the performance of the crawlers. It is only by means of the crawlers that the most relevant information is displayed to the searchers on the web. When a search phrase is entered by a visitor, the crawlers collect the best and relevant information on the web and display it to the viewers. SEO companies keep on analyzing the strategies of a web crawler so that they can decide on the best means of achieving higher ranking for a website. The algorithms are usually a combination of content, inbound link, loading time and certain keywords or phrases used by the searchers to seek information.About the Author:
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