How Do search Engines work?
It's important to remember that when you do a web search you are not searching the entire internet. In reality you are searching the database of the search engine you are using. Search engines explore the internet and store web pages and the information they contain in their databases. When you use a search engine you are only searching for information that is contained within that specific database. Ex: A Google web search will only explore the Google database. For a visual of this process you can check out Google's search story.
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