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  1. Explore the world of Google Search. Discover the details of how Search works - from the technology we make to the approach we take.

    • Our History

      Since our launch in 1997, Google Search has continued to...

    • Detecting Spam

      Google invests in systems to ensure that sites don’t rise in...

    • A Few Notes Before We Get Started
    • Introducing The Three Stages of Google Search
    • Crawling
    • Indexing
    • Serving Search Results

    Before we get into the details of how Search works, it's important to note that Google doesn't accept payment to crawl a site more frequently, or rank it higher. If anyone tells you otherwise, they're wrong. Google doesn't guarantee that it will crawl, index, or serve your page, even if your page follows the Google Search Essentials.

    Google Search works in three stages, and not all pages make it through each stage: 1. Crawling:Google downloads text, images, and videos from pages it found on the internet with automated programs called crawlers. 2. Indexing:Google analyzes the text, images, and video files on the page, and stores the information in the Google index, which is a la...

    The first stage is finding out what pages exist on the web. There isn't a central registry of all web pages, so Google must constantly look for new and updated pages and add them to its list of known pages. This process is called "URL discovery". Some pages are known because Google has already visited them. Other pages are discovered when Google fo...

    After a page is crawled, Google tries to understand what the page is about. This stage is called indexing and it includes processing and analyzing the textual content and key content tags and attributes, such as elements and alt attributes, images, videos, and more. During the indexing process, Google determines if a page is a duplicate of ...

    When a user enters a query, our machines search the index for matching pages and return the results we believe are the highest quality and most relevant to the user's query. Relevancy is determined by hundreds of factors, which could include information such as the user's location, language, and device (desktop or phone). For example, searching for...

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  3. Our approach. . How Search works. . Organising information. . Ranking results. . Rigorous testing. . Detecting spam. . Features. . Our history. . Our mission is to organise the world’s...

  4. May 30, 2019 · Google uses automated programs called spiders or crawlers, just like most search engines, to help generate its search results. Google has a large index of keywords that help determine search results. What sets Google apart is how it ranks its results, which determines the order Google displays results on its search engine results pages. Google ...

  5. Feb 15, 2024 · Demystify the world of Google Search with Gary Illyes, Engineer on the Google Search team, in this new series: How Search Works. What is crawling, indexing, and serving when it comes to...

    • 4 min
    • 38.4K
    • Google Search Central
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