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Search engine cache

From Wikipedia, in a visual modern way
The link for the cached version of a web page in search results from Google (top), Bing (middle) and Yandex (bottom)
The link for the cached version of a web page in search results from Google (top), Bing (middle) and Yandex (bottom)
The link for the cached version of a web page in search results from Google (top), Bing (middle) and Yandex (bottom)
The link for the cached version of a web page in search results from Google (top), Bing (middle) and Yandex (bottom)

Search engine cache is a cache of web pages that shows the page as it was when it was indexed by a web crawler. Cached versions of web pages can be used to view the contents of a page when the live version cannot be reached, has been altered or taken down.[1]

When a web crawler crawls the web, it collects the contents of each page to allow the page to be indexed by the search engine. At the same time, it can store a copy of that page and it is not just one time when the crawler will crawl our website again next time, again it will store a copy of Each web pages and this process goes on. The search engine may make the copy accessible to users in the search engine results. Web crawlers that obey restrictions given in robots.txt[2] or meta tags[3] by the webmaster may not make a cached copy available to search engine users if instructed not to.

Search engine cache can be used for crime investigation,[4] legal proceedings[5] and journalism.[6][1] Examples of search engines that offer their users cached versions of web pages are Google Search, Bing, Yandex Search, and Baidu.

Search engine cache may not be fully protected by the usual laws that protect technology providers from copyright infringement claims.[7]

Some search engine caches may be equipped with additional functionality such as the ability to view the page as simple unstyled hypertext or its source code, as supported by Google Cache ("Full version", "Text-only version", "View source").

Discover more about Search engine cache related topics

Cache (computing)

Cache (computing)

In computing, a cache is a hardware or software component that stores data so that future requests for that data can be served faster; the data stored in a cache might be the result of an earlier computation or a copy of data stored elsewhere. A cache hit occurs when the requested data can be found in a cache, while a cache miss occurs when it cannot. Cache hits are served by reading data from the cache, which is faster than recomputing a result or reading from a slower data store; thus, the more requests that can be served from the cache, the faster the system performs.

Web page

Web page

A web page is a hypertext document on the World Wide Web. Web pages are delivered by a web server to the user and displayed in a web browser. A website consists of many web pages linked together under a common domain name. The name "web page" is a metaphor of paper pages bound together into a book.

Web crawler

Web crawler

A Web crawler, sometimes called a spider or spiderbot and often shortened to crawler, is an Internet bot that systematically browses the World Wide Web and that is typically operated by search engines for the purpose of Web indexing.

Downtime

Downtime

The term downtime is used to refer to periods when a system is unavailable.

File deletion

File deletion

File deletion is the removal of a file from a computer's file system.

Robots.txt

Robots.txt

robots.txt is a standard used by websites to indicate to visiting web crawlers and other web robots which portions of the website they are allowed to visit.

Meta element

Meta element

Meta elements are tags used in HTML and XHTML documents to provide structured metadata about a Web page. They are part of a web page's head section. Multiple Meta elements with different attributes can be used on the same page. Meta elements can be used to specify page description, keywords and any other metadata not provided through the other head elements and attributes.

Forensic science

Forensic science

Forensic science, also known as criminalistics, is the application of science to criminal and civil laws, mainly—on the criminal side—during criminal investigation, as governed by the legal standards of admissible evidence and criminal procedure. Forensic science is a broad field including a multitude of practices like DNA analysis, fingerprint analysis, blood stain pattern analysis, firearms examination and ballistics, tool mark analysis, serology, toxicology, hair and fiber analysis, entomology, questioned documents, anthropology, odontology, pathology, epidemiology, footwear and tire tread analysis, drug chemistry, paint and glass analysis, digital audio video and photo analysis.

Legal proceeding

Legal proceeding

Legal proceeding is an activity that seeks to invoke the power of a tribunal in order to enforce a law. Although the term may be defined more broadly or more narrowly as circumstances require, it has been noted that "[t]he term legal proceedings includes proceedings brought by or at the instigation of a public authority, and an appeal against the decision of a court or tribunal". Legal proceedings are generally characterized by an orderly process in which participants or their representatives are able to present evidence in support of their claims, and to argue in favor of particular interpretations of the law, after which a judge, jury, or other trier of fact makes a determination of the factual and legal issues.Activities needed to have a court deem legal process to have been provided, such as through service of process. Conduct of a trial, whether a lawsuit or civil trial, or a criminal trial. Issuance and enforcement of court orders, including those imposing foreclosure or receivership. Hearings, particularly administrative hearings. Arbitration.

Journalism

Journalism

Journalism is the production and distribution of reports on the interaction of events, facts, ideas, and people that are the "news of the day" and that informs society to at least some degree of accuracy. The word, a noun, applies to the occupation, the methods of gathering information, and the organizing literary styles.

Google Search

Google Search

Google Search is a search engine provided and operated by Google. Handling more than 3.5 billion searches per day, it has a 92% share of the global search engine market. It is the most-visited website in the world. Additionally, it is the most searched and used search engine in the entire world.

Baidu

Baidu

Baidu, Inc. is a Chinese multinational technology company specializing in Internet-related services, products, and artificial intelligence (AI), headquartered in Beijing's Haidian District. It is one of the largest AI and Internet companies in the world. The holding company of the group is incorporated in the Cayman Islands. Baidu was incorporated in January 2000 by Robin Li and Eric Xu. Baidu has origins in RankDex, an earlier search engine developed by Robin Li in 1996, before he founded Baidu in 2000.

Source: "Search engine cache", Wikipedia, Wikimedia Foundation, (2022, December 7th), https://en.wikipedia.org/wiki/Search_engine_cache.

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Further Reading

Web crawler

Search engine optimization

Googlebot

Deep web

Metasearch engine

Search engine

Bing Webmaster Tools

LeapFish
References
  1. ^ a b Wilfried Ruetten (2012). The Data Journalism Handbook. O'Reilly Media, Inc. ISBN 9781449330064. When a page becomes controversial, the publishers may take it down or alter it without acknowledgment. If you suspect you're running into the problem, the first place to turn is Google's cache of the page as it was when it did its last crawl.
  2. ^ "Robots meta tag, data-nosnippet, and X-Robots-Tag specifications". noarchive: Do not show a cached link in search results.
  3. ^ "Special tags that Google understands - Search Console Help". noarchive - Don't show a Cached link for a page in search results.
  4. ^ Todd G. Shipley, Art Bowker (2013). Investigating Internet Crimes: An Introduction to Solving Crimes in Cyberspace. Newnes. ISBN 9780124079298. For the investigator this can be a valuable piece of information. Depending on when Google crawled the site, the last page may contain information different from the current page. Documenting and capturing Google's cached page of a webpage can therefore be important step to ensure this time snapshot is preserved.
  5. ^ Steven Mark Levy (2011). Regulation of Securities: SEC Answer Book. Aspen Publishers Online. ISBN 9781454805434. The World Wide Web is not as ephemeral as one might think. An increasing number of older web pages are available online through such services as the Wayback Machine, Google Cache, Yahoo Cache, or Bing Cache. Some plaintiffs' lawyers and corporate gadflies use these services as a matter of routine.
  6. ^ Cleland Thom (2014-10-23). "Google's caches and .com search engine provide 'right to be forgotten' solutions". Press Gazette. Journalists can also access delisted content via the Google cache.
  7. ^ Herman De Bauw, Valerie Vandenweghe (June 2011). "Brussels Court of Appeal upholds judgment against Google News and Google Cache". Archived from the original on 2015-04-26. For the cache function, the Court rejected the exception of a "technically necessary copy". This exception exempts temporary reproduction which is a necessary part of a technical process applied by an intermediary for transmission in a network between third parties. According to the Court, the cache copy that Google stores on its server is not technically necessary for efficient transmission.


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