Search engines are software programs, not rational human beings, they work according to rules established by their creators for what words are usually important in a broad range of documents.
The basic functions of a search engine can be described as crawling, data mining, indexing and query processing. Crawling is the act of sending small programed bots out to collect information. Data mining is storing the information collected by the bots. Indexing is ordering the information systematically.
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Answer:
Search engines are software programs, not rational human beings, they work according to rules established by their creators for what words are usually important in a broad range of documents.
The basic functions of a search engine can be described as crawling, data mining, indexing and query processing. Crawling is the act of sending small programed bots out to collect information. Data mining is storing the information collected by the bots. Indexing is ordering the information systematically.