Lesson 46: Search Engines

What is a Search Engine?

A search engine is a computer program that searches for specific words on the World Wide Web and returns a list of documents in which they were found. Examples include Google and Yahoo.

Advanced Features of Search Engines

  • Keyword search: allows users to search for specific words or phrases.
  • Phrase search: allows users to search for exact phrases.
  • Site search: allows users to search within a specific website.
  • File type search: allows users to search for specific file types (e.g., PDF, DOCX).

Examples of Search Engines

  • Google: a popular search engine that uses advanced algorithms to retrieve relevant results.
  • Bing: a search engine developed by Microsoft that provides accurate results.
  • Yahoo: a search engine that uses Bing’s algorithm to retrieve results.
  • DuckDuckGo: a search engine that prioritizes user privacy and does not track searches.
  • StartPage: a search engine that prioritizes user privacy and does not track searches.

Factors That Influence Search Results

  • Keywords: the words or phrases used in the search query.
  • Algorithm: the formula used by the search engine to rank results.
  • Relevance: how well the result matches the search query.
  • Popularity: the number of links to a webpage.
  • Location: the user’s location and language.
  • Device: the device used to search (e.g., desktop, mobile).

Common Parts of a Search Engine Results Page

  • Search bar: where users enter their search query.
  • Search results: the list of webpages that match the search query.
  • Title, URL and snippet: the title, web address and brief summary of each result.
  • Sponsored results: paid advertisements that match the search query.
  • Organic results: unpaid search results that match the search query.

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