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| Basics of search engine working explained. |
Search engines are automatic programs, which do not have human interface. Human interference may only needed when someone is cheating these programs to mislead the search results.
The working of a search engine can be split into 3 parts.
1. Crawling or Spidering
2. Indexing
3. Ranking
A spider crawls/spiders a huge number of pages each day. Each search engine will have a large number of individual spiders. A spider is a program that reads a web page, and then follows the links on that page to other pages. A spider repeatedly visits a web page looking for changes. The frequency of this visit varies from Website to Website based on the nature of that web page.
What ever the spider finds is stored in a index or catalog which is a huge data collection center. It consists of an array of computers to store the data.
Finally when a searcher search a key word/ key phrase, a software will get the pages from its index, sort it in a order according to an algorithm which may put across the best site first. |
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