HOW SEARCH ENGINES WORK
A search engine is a web site used by the public to find web sites and information on the internet – but how does it work? Below is an introduction to how a search engine works.
Internet search engines work by storing information on a large number of pages on the web. Every search engine has what are called web crawlers (also known as spiders) which ‘crawl’ the internet, following every hyperlink in its path. The web crawler will gather information on every page it visits, and this is stored on the search engine’s information database. These pages are analysed by the system, and are then indexed using key words taken from the title, body of text or special html fields called meta tags.
When you visit a search engine and type in what you are looking for, the moment you click “search”, the engine begins to locate all web sites indexed with the words you have entered, i.e. if you searched for “web design”, the system would locate all listed web sites that have the words “web” and/ or “design” in their title, body of text or meta tags. The web sites that appear in the top search results are the pages that have the closest correlation to the specified key words that were initially entered.
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How Search Engines Work
