What is search engine?

 A search engine is a software system that helps people find information on the internet by typing in keywords or questions. It searches through billions of web pages and returns the most relevant results.

🔍 Common Examples of Search Engines:

  • Google (most popular)

  • Bing (by Microsoft)

  • Yahoo

  • DuckDuckGo (focuses on privacy)

  • Baidu (popular in China)

  • Yandex (popular in Russia)

🧠 How a Search Engine Works:

  1. Crawling

    • The search engine uses software called "crawlers" or "bots" to scan the web and discover new or updated pages.

  2. Indexing

    • All the discovered pages are stored and organized in a huge database called an “index”.

  3. Ranking & Retrieval

    • When you search for something, the search engine finds the most relevant pages from the index and ranks them based on many factors like keywords, quality, and usability.

🧩 What You See in a Search Engine:

  • Search Bar – Where you type your query.

  • Search Results Page (SERP) – A list of links, summaries, ads, and media based on your query.

✅ Uses of Search Engines:

  • Finding websites, images, or videos

  • Getting answers to questions

  • Finding products or businesses

  • Researching topics


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