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Two projects of such internal research and development have been the creation of a Visual Editor and the “Thank” tab in the edit history, which were developed to improve issues of editor attrition. Following growing amounts of incoming donations in 2013 exceeding seven digits, the Foundation has reached a threshold of assets which qualify its consideration under the principles of industrial organization economics to indicate the need for the re-investment of donations into the internal research and development of the Foundation. In 2017, Wikipedia installed a caching cluster in an Equinix facility in Singapore, the first of its kind in Asia.W 80 In 2022, a caching data center was opened in Marseille, France.W 81 In 2024, a caching data center was opened in São Paulo, the first of its kind in South America.W 82 As of November 2024,update caching clusters are located in Amsterdam, San Francisco, Singapore, Marseille, and São Paulo.W 83W 84

According to the rules on the English Wikipedia community, each entry in Wikipedia must be about a topic that is encyclopedic and is not a dictionary entry or dictionary-style.W 28 A topic should also meet Wikipedia’s standards of “notability”, which generally means that the topic has been covered extensively in reliable sources that are independent of the article’s subject. Originally, rules on the non-English editions of Wikipedia were based on a translation of the rules for the English Wikipedia. The rules developed by the community are stored in the Wikipedia namespace, and Wikipedia editors write and revise the website’s policies and guidelines in accordance with community consensus. Wikipedia is composed of 11 different namespaces,needs update with its articles being present in mainspace.

In December 2015, John Julius Norwich stated, in a letter published in The Times newspaper, that as a historian he resorted to Wikipedia “at least a dozen times a day”, and had “never caught it out”. Media files covered by free content licenses (e.g. Creative Commons’ CC BY-SA) are shared across language editions via Wikimedia Commons repository, a project operated by the Wikimedia Foundation.W 96 Wikipedia’s accommodation of varying international copyright laws regarding images has led some to observe that its photographic coverage of topics lags behind the quality of the encyclopedic text. Though the various language editions are held to global policies such as “neutral point of view”, they diverge on some points of policy and practice, most notably on whether images that are not licensed freely may be used under a claim of fair use.W 41 The content of articles on the same subject can differ significantly between languages, depending on the sources editors use and other factors. A 2007 study by researchers from Dartmouth College found that “anonymous and infrequent contributors to Wikipedia … are as reliable a source of knowledge as those contributors who register with the site”. In January 2025, the Arbitration Committee introduced the “balanced editing restriction”, which requires sanctioned users to devote only a third of their edits to articles related to the Israeli–Palestinian conflict even when no misconduct rules have been violated. Under this system, new and unregistered users’ edits to certain controversial or vandalism-prone articles are reviewed by established users before they are published.

Vandalism

Vandals can introduce irrelevant formatting, modify page semantics such as the page’s title or categorization, manipulate the article’s underlying code, or use images disruptively.W 25 Less common types of vandalism, such as the deliberate addition of plausible but false information, can be more difficult to detect. Sometimes editors commit vandalism by removing content or entirely blanking a given page. The most common and obvious types of vandalism include additions of obscenities and crude humor, but it can also include advertising and other types of spam. Any change that deliberately compromises Wikipedia’s integrity is considered vandalism. In 2003, economics PhD student Andrea Ciffolilli argued that the low transaction costs of participating in a wiki created a catalyst for collaborative development, and that features such as allowing easy access to past versions of a page favored “creative construction” over “creative destruction”.

Wikipedia articles on breaking news are accessed as sources for up-to-date information by many. Initially available only in English, Wikipedia has grown to over 300 languages and is one of the world’s most visited websites as of 2026update. It is understood either as a neutral middle ground between the two or as a rejection of their shared assumption that knowledge is attainable.

Impacts of generative AI on Wikipedia views

Wikipedia currently runs on dedicated clusters of Linux servers running the Debian operating system.W 78 By January 22, 2013, Wikipedia had migrated its primary data center to an Equinix facility in Ashburn, Virginia.W 79 A second application data center was created in 2014 in Carrollton, Texas, to improve Wikipedia’s reliability. Bots are able to indicate edits from particular accounts or IP address ranges, as occurred at the time of the shooting down of the MH17 jet in July 2014 when it was reported that edits were made via IPs controlled by the Russian government. Additionally, there are bots designed to automatically notify editors when they make common editing errors (such as unmatched quotes or unmatched parentheses).W 75 Edits falsely identified by bots as the work of a banned editor can be restored by other editors. Computer programs called bots have often been used to perform simple and repetitive tasks, such as correcting common misspellings and stylistic issues, or to start articles such as geography entries in a standard format from statistical data.W 74 One controversial contributor, Sverker Johansson, created articles with his bot Lsjbot, which was reported to create up to 10,000 articles on the Swedish Wikipedia on certain days. She stated that one of her focuses would be increasing diversity in the Wikimedia community.

In the news

For instance, on the English Wikipedia and some other language editions, only users with 10 edits that have an account that is four days old may create a new article.W 19 On the English Wikipedia, among others, particularly controversial, sensitive, or vandalism-prone pages have been protected to varying degrees. Wikipedia has been praised for its internal structure and culture, enabling the democratization of knowledge, and for its extensive coverage on various topics. Several free-content, collaborative encyclopedias were created around the same period as Wikipedia (e.g. Everything2), with many later being merged into the project (e.g. GNE).W 120 One of the most successful early online encyclopedias incorporating entries by the public was h2g2, which was created by Douglas Adams in 1999. In 2015, kinbet casino en ligne French researchers José Lages of the University of Franche-Comté in Besançon and Dima Shepelyansky of Paul Sabatier University in Toulouse published a global university ranking based on Wikipedia scholarly citations. Andrew Lih and Andrew Brown both maintain that editing Wikipedia with smartphones is difficult, and this discourages new potential contributors.

Launch and growth

Others use more traditional peer review, such as Encyclopedia of Life and the online wiki encyclopedias Scholarpedia and Citizendium. This was the first interactive multimedia encyclopedia (and was also the first major multimedia document connected through internal links), with the majority of articles being accessible through an interactive map of the UK. The first of these was the 1986 BBC Domesday Project, which included text (entered on BBC Micro computers) and photographs from more than a million contributors in the UK, and covered the geography, art, and culture of the UK. Several interactive multimedia encyclopedias incorporating entries written by the public existed long before Wikipedia was founded. One of the most important areas is the automatic detection of vandalism and data quality assessment in Wikipedia.

Policies and content

Marginalized topics are also more likely to lack significant coverage in reliable sources. Wikipedia’s policies may limit “its capacity for truly representing global knowledge”. Through its “Wikipedia Loves Libraries” program, Wikipedia has partnered with major public libraries such as the New York Public Library for the Performing Arts to expand its coverage of underrepresented subjects and articles. Since it has terabytes of disk space, it can have far more topics than can be covered by any printed encyclopedia.W 50 The exact degree and manner of coverage on Wikipedia is under constant review by its editors, and disagreements are not uncommon (see deletionism and inclusionism). Wikipedia seeks to create a summary of all human knowledge in the form of an online encyclopedia, with each topic covered encyclopedically in one article. The study concluded that learning with Wikipedia in flipped classrooms was more effective than in conventional classrooms, demonstrating that Wikipedia could be used as an educational tool in higher education.

Due to Wikipedia’s increasing popularity, some editions, including the English version, have introduced editing restrictions for certain cases. Wales’ book The Seven Rules of Trust was published in October 2025 by Penguin Random House. Both Sanger and Wales gave public interviews in late 2025 about their reflections about the status and state of Wikipedia, leading up to its 25 years of operation on January 15, 2026; Wales appeared on the PBS television news show GZERO World interviewed by Ian Bremmer and Sanger has appeared on the Fox News Channel, interviewed by Ashley Rindsberg. It featured a redesigned menu bar, moving the table of contents to the left as a sidebar, and numerous changes in the locations of buttons like the language selection tool.W 18 The update initially received backlash, most notably when editors of the Swahili Wikipedia unanimously voted to revert the changes. Jeff Loveland and Joseph Reagle argue that, in process, Wikipedia follows a long tradition of historical encyclopedias that have accumulated improvements piecemeal through “stigmergic accumulation”. In 2012, Wikivoyage, an editable travel guide, and Wikidata, an editable knowledge base, launched.W 15

This is used, for example, in confirming the permission for using individual images and other media in the project.W 56 In January 2006, a German court ordered the German Wikipedia shut down within Germany because it stated the full name of Boris Floricic, aka “Tron”, a deceased hacker. Critics, including Wikipediocracy, noticed that many of the pornographic images deleted from Wikipedia since 2010 have reappeared. Wikimedia Foundation spokesman Jay Walsh strongly rejected Sanger’s accusation, saying that Wikipedia did not have “material we would deem to be illegal. If we did, we would remove it.” Following the complaint by Sanger, Wales deleted sexual images without consulting the community. That law bans photographic child pornography and cartoon images and drawings of children that are obscene under American law.

In 2020, researchers identified other measures of editor behaviors, beyond mutual reverts, to identify editing conflicts across Wikipedia. By comparison, for the German Wikipedia, the three largest conflict rates at the time of the study were for the articles covering Croatia, Scientology, and 9/11 conspiracy theories. Research has focused on, for example, impoliteness of disputes, the influence of rival editing camps, the conversational structure, and the shift in conflicts to a focus on sources. The incident led to policy changes at Wikipedia for tightening up the verifiability of biographical articles of living people. Obvious vandalism is generally easy to remove from Wikipedia articles; the median time to detect and fix it is a few minutes.

A 2008 study found that Wikipedians were less agreeable, open, and conscientious than others, although a later commentary pointed out serious flaws, including that the data showed higher openness and that the differences with the control group and the samples were small. In 2008, a Slate magazine article reported that “one percent of Wikipedia users are responsible for about half of the site’s edits.” This method of evaluating contributions was later disputed by Aaron Swartz, who noted that several articles he sampled had large portions of their content (measured by number of characters) contributed by users with low edit counts. An editor is considered active if they have made one or more edits in the past 30 days.W 34 Editors who fail to comply with Wikipedia cultural rituals, such as signing talk page comments, may implicitly signal that they are Wikipedia outsiders, increasing the odds that Wikipedia insiders may target or discount their contributions. Wikipedia does not require that its editors and contributors provide identification. Complete bans from Wikipedia are generally limited to instances of impersonation and antisocial behavior.W 32 When conduct is not impersonation or anti-social, but rather edit warring and other violations of editing policies, solutions tend to be limited to warnings.