For a spider to find a web page, the page has to be linked to by another page. If there has been no linking, then another way to bring a web page to the notice of the crawlers is by sending the site URL to search engine companies and requesting them to include the new page into their search. Most search engines operate several spiders at a time.
The next step is indexing, where the pages are sent to another computer program, where links, keywords, etc. play a major role in identifying the relevancy and the relation of a web page to the search. The search engine picks up only pages that are relevant from their database which exists on servers and feature them on search engine results page.
Some pages, however, do not come up in search engine searches. They form that part of the web known as the ‘Invisible Web’ or ‘Deep Web’. In a study, the University of California, Berkeley, estimated that the ‘Deep Web’ contained approximately 91,000 terabytes of data and 550 billion individual documents. There are reasons why the web spiders cannot access these pages.
One reason can be the problem of them being too inane or irrelevant or badly conceptualized, thus posing the problem of too much clutter. Another reason is the presence of technical barriers where spiders cannot perform by themselves. For instance, pages where access is granted only by typing manually, member’s only sites, etc.
At Cosmos Creative Services, our SEO team submits your website using accurate techniques that make it easy for algorithmic crawlers [spiders] to notice and provide links to and ultimately result in being picked up by a search engine quickly.