how does a search engine work explain
Answers
A search engine makes this index using a program called a 'web crawler'. ... These pages will be left out of the index, along with pages that no-one links to. The information that the web crawler puts together is then used by search engines. It becomes the search engine's index.
Most search engines build an index based on crawling, which is the process through which engines like Google, Yahoo and others find new pages to index. Mechanisms known as bots or spiders crawl the Web looking for new pages (1). The bots typically start with a list of website URLs determined from previous crawls. When they detects new links on these pages, through tags like HREF and SRC, they add these to the list of sites to index. Then, search engines use their algorithms to provide you with a ranked list from their index of what pages you should be most interested in based on the search terms you used.
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