The so called search box should be given a correct name search engine which can be further divided into keyword search engines and web directories. Web surfers can make use these two types of searching methods alternatively for better search results.
Search engines accumulated their data volume through spiders or robots that work among billions of websites and collect them back to the databases and index them into good order for future query by web surfers. Complicated algorithm will perform calculations and pick up right results according to keywords provided by web surfers.
There are virtually countless websites for spiders to crawl. How spiders crawl these sites? They start crawling those sites that attract bigger volume, coming to the end through sophisticated internal links. And that is the reason why website should always be linked to high traffic site for optimum market exposure.
Search engine crawlers will crawl web pages periodically for updated contents. The newly added contents should be available to web surfers at the next database updates which normally take few days up to few months.
At the moment, there are two types of...
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