Hi there The Spider (crawler) at Work
They are called spiders because they crawl over the Web in search of content. Search engines gather data about a website by ‘sending' the spider or bots to ‘read' the site and copy its content. This content is stored in the search engine's database. As they copy and absorb content from one document, they create record links and send other bots to make copies of content on those linked documents this process goes on and on. As of now the major search engines have established databases that measure their size in the tens of billions using this process.
Spiders are designed to read site content like a human. It will start at the top left hand corner, reading line by line. In case of columns spiders will read the left hand column before moving to central and right hand column. It will read and record the whole site to the very last word. |