HOW SEARCH ENGINES WORK
This article explains how search engines work. It covers the basics of how search engines find web pages, what they do with the pages they find, and how they decide which results to show. When you use a search engine to find your nearest coffee shop, you probably don't think about search engine technology. But later on you may wonder, "How did that happen?" How did you scan the entire web so quickly and select the results displayed on the page?" Each search engine uses its own software program, but they are fairly similar in how they work. They all perform three tasks: First, learners examine and authorize the content they learn (this is called crawling). Then classify each piece of content (this is called indexing). And third, she determines what content is most useful to searchers (this is called ranking). Let's take a closer look at how these work. Search engines "crawl" the Internet to discover content such as web pages, images, and videos. All sear