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  2. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    This class of status code indicates the client must take additional action to complete the request. Many of these status codes are used in URL redirection. [2]A user agent may carry out the additional action with no user interaction only if the method used in the second request is GET or HEAD.

  3. Web crawler - Wikipedia

    en.wikipedia.org/wiki/Web_crawler

    A Web crawler starts with a list of URLs to visit. Those first URLs are called the seeds.As the crawler visits these URLs, by communicating with web servers that respond to those URLs, it identifies all the hyperlinks in the retrieved web pages and adds them to the list of URLs to visit, called the crawl frontier.

  4. Common Crawl - Wikipedia

    en.wikipedia.org/wiki/Common_Crawl

    The donated data helped Common Crawl "improve its crawl while avoiding spam, porn and the influence of excessive SEO." [11] In 2013, Common Crawl began using the Apache Software Foundation's Nutch webcrawler instead of a custom crawler. [12] Common Crawl switched from using .arc files to .warc files with its November 2013 crawl. [13]

  5. robots.txt - Wikipedia

    en.wikipedia.org/wiki/Robots.txt

    Robots.txt files are particularly important for web crawlers from search engines such as Google. Additionally, optimizing the robots.txt file can help websites prioritize valuable pages and avoid search engines wasting their crawl budget on irrelevant or duplicate content, which improves overall SEO performance."Understanding Robots.txt for SEO".

  6. Googlebot - Wikipedia

    en.wikipedia.org/wiki/Googlebot

    Googlebot is the web crawler software used by Google that collects documents from the web to build a searchable index for the Google Search engine. This name is actually used to refer to two different types of web crawlers: a desktop crawler (to simulate desktop users) and a mobile crawler (to simulate a mobile user).

  7. HTTP 404 - Wikipedia

    en.wikipedia.org/wiki/HTTP_404

    One of the most effective ways to discover 404 errors is by using Google Search Console, Google Analytics or crawling software. Another common method is tracking traffic to 404 pages using log file analysis. [ 21 ]

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  9. Google - Wikipedia

    en.wikipedia.org/wiki/Google

    Google Workspace (formerly G Suite until October 2020 [201]) is a monthly subscription offering for organizations and businesses to get access to a collection of Google's services, including Gmail, Google Drive and Google Docs, Google Sheets and Google Slides, with additional administrative tools, unique domain names, and 24/7 support.