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How search engine works

What is search engine ?

Search Engine is a Web based Tool or Software,Which helps internet users to search information on world Wide Web.

Like- Google, Yahoo, Bing etc are the popular search engines! that is find the data and information from the keyword and phrases to search and shows in your result page.

for example, suppose you can search on Google “what is search engine?” so Google will match your search keyword from all the database and websites available on the internet.And all the data related to it will show according to its search ranking on your result page.

When the user type word in search bar on google or any other search engine that is called keyword.

How Search engine works

A search engine have three primary functions to search the search by results.

And these 3 steps are as follows:

  1. Crawling
  2. Indexing
  3. Ranking and Retrieval


Crawling is first step to search a web page.There are automatic spider, bots or crawlers for any search Engine, They can collects every pages and content where our keyword matched.

According to google their crawlers and bots are collects 100 to 1000 information pages in 1 second. when bots or crawlers gets a new page they send it to the Back-end processing.


Indexing is come after the process of crawling . In this process after crawling, collects all the information of web pages and database and list it by the ranking, this process is called Indexing.

Ranking and Retrieval

Ranking and Retrieval is the last and most important step for a search engine. Database and web pages collected as indexing and they are again rank by the basis of many of their properties like Popularity,Content age and Content keyword.

There are many algorithm for ranking and retrieval in every search engine. Because of this our search results are correct and accurate. And whenever we do search, we get the best result at first of the search.

Types of search engine

There are 4 types of search engine.

  1. Crawler-Based Search Engine
  2. Web Directories
  3. Hybrid Search Engines
  4. Meta Search Engines

Example of search engine

  • Google
  • Yahoo!
  • Bing
  • DuckDuckGo
  • Yandex
  • Ask


Google , Yahoo etc all these search engines are actually software programs,After searching whatever , the search engine gives all the information available online related to it very quickly.

All search engines work like this – Collect information, rank it by analyzing it and show results to the user.

Contributed By :- Priya Chauhan


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