Think of this like searching for a library book using the facilities’ own index files – you might have to be in the library to search there. The deep web also includes most academic content handled directly by universities. This means content of such sites isn’t accessible to web crawlers. You may be able to search such pages but you do so using their own internal search function, not a search engine like Bing or Yahoo. Data brokers such as LocalBlox for instance crawl the web and store information about business and consumers to sell for marketing purposes.ĭeep sites also include company intranets and governmental websites, for instance the website of the European Union. There are also millions of servers which only store data which can’t be accessed via a public web page. Examples of this might be e-mail accounts or registration-only forums. This could include sites not automatically available to the public, such as those which require a password. The deep web is like an archive, containing an unsorted pile of websites and resources that are largely inaccessible to normal users.
It refers to the unindexed web databases and other content that search engines can't crawl through and catalog. The term ‘deep web’ doesn’t mean anything nefarious - it’s estimated to make up about 99% of the entire web. Still, this open and cataloged “crawled” web content is still estimated to make up less than 1% of the internet. This accounts for well over 80 percent of the company’s revenue, linking people who are searching with the millions of sites out there that pay Google to list their content. Knowing where online materials are – and who is searching for them – makes it possible for search engines like Google to sell advertisements. Most sites do this by deliberately placing “meta tags” in their website code to make it easier for crawlers to catalog them properly. This makes perfect sense as the entire purpose of creating a website is so that people can access your content and/or buy your products. Most corporate and public sites work hard to make sure that these web crawlers can easily find them. This makes it easy for them (and you) to find websites. Crawlers can automatically scan websites and their links, then record them.
They do this through using “crawlers”, sometimes also known as “spiders” or “robots”. But if you want to find something specific, you can also ask a Librarian to help you locate it.īrowsers such as Google, Bing, DuckDuckGo act like virtual librarians, sorting and cataloging materials so they can be easily searched.
If you have time on your hands, you can just wander through the aisles of a library looking at every book.
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