Each and every search engine has their own unique technique to index the WebPages in directory. Search engine software is crawler and spiders or Google bot for Google search engine. These techniques are nothing but complex programs to automate the indexing procedure without manual interference.
Spider traverses the web pages from one link to another link and indexes each and every link on the way. Internet is growing vastly day by day and then web pages so it is impossible for spider to visit each and every page daily. So what if you have updated your page and spider does not visited your website, your work is waste. Spider is predominantly used by Google search engine bots. Google page ranking also depends on how old your website or blog is! Older the websites have higher ranking.
WebCrawler scan your website or web pages to analysis the content of your web page. It is very important to analysis that what a crawler could view from your site. After scanning your web page or blog indexing of the website starts. Indexing is most typical and complex part of the search engine algorithms that identifies the words and expressions that best describes the page and assigns the page to a particular keyword. Yahoo and MSN search engines predominantly uses on page content rather than links.
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