Wikipedia - Wikimedia Foundation Inc.

10/10/2025 | Press release | Distributed by Public on 10/10/2025 10:52

Wikimedia Foundation responds to questions about how Wikipedia works

For media inquiries, please contact [email protected].

October 10, 2025 - Recently, there has been growing media and other attention around Wikipedia and how it works. The Wikimedia Foundation, the nonprofit that hosts Wikipedia, continues to welcome opportunities to explain more about Wikipedia's oversight and mechanisms to keep information safe, whether these questions come from governments, organizations, the press, or users. This reflects our commitment to openness and transparency, guided by standards of reliability and neutrality. We share this statement to correct the record and to clarify the ways in which Wikipedia prevents bias and delivers trusted information that millions around the world depend on every day.

How does Wikipedia work?

Wikipedia is the world's largest online encyclopedia. All of the information on Wikipedia is governed by a set of editorial policies and guidelines developed and enforced by volunteer editors who add content to the site. These policies require information to be well-sourced and delivered from a neutral point of view. In addition, original research is not permitted on Wikipedia.

Wikipedia works because volunteers from around the world follow these policies to compile and share information on notable topics, citing reliable sources such as newspaper articles, books, and peer-reviewed research. All sources used to build a Wikipedia article are available to see in every article. In addition, Wikipedia's processes allow anyone to review the content decisions made by editors.

Editors publicly discuss, debate, and often disagree until a shared consensus can be reached on what content to include on Wikipedia. Over time, this consensus can change and evolve with new sources and new information. In addition to the many editorial policies that govern content on Wikipedia, a Universal Code of Conduct provides a baseline standard for how volunteers interact with each other. The Wikimedia Foundation provides technology and legal support but does not write or control the content on Wikipedia-volunteer editors do.

What does neutrality mean on Wikipedia?

Neutrality is one of Wikipedia's most fundamental and bedrock policies. Information must be written as far as possible without editorial bias. This means Wikipedia presents positions as they are described in reliable sources; personal opinion or commentary is not allowed.

Wikipedia articles should not try to convince readers of a certain viewpoint, use promotional language, or state opinions as facts. When news stories, experts, or books disagree, the goal is to explain each viewpoint with proper credit and space according to the prominence it is given in reliable sources.

The process of writing neutrally is ongoing and depends on editors working together, discussing differences, and using sources to update evolving information. In this way, editors capture what reliable sources say and ensure articles are balanced through collaboration and careful checking.

Who decides what is a reliable source on Wikipedia?

No one person or organization makes a decision about what sources can be cited on Wikipedia. Reliable sources on Wikipedia are evaluated and selected through an open, transparent process involving thousands of editors worldwide.

When evaluating a source, editors assess how the source is used by other publications, examining their track record for fact-checking, accuracy, scholarly standards, and editorial oversight. For example, volunteers may consider how often a source is referenced by other information outlets, whether it describes itself as co-mingling opinion with fact, whether it meets standards like peer-review, and how that source is used or critiqued elsewhere. Reliable sources are those that meet Wikipedia's criteria for encyclopedic content, not a judgment about the overall reliability of a source in the broader media ecosystem.

The use of a source on Wikipedia is considered on a case-by-case basis, and relies on the context of the topic being written about-for example, a publication specializing in one field may not necessarily be considered reliable for claims made about another field. These evaluations of sources are public, documented, and open to discussion, meaning users can participate in their review. The status of a source can change over time as new information becomes available.

When a particular source is discussed multiple times by the volunteer community, it may be added to a list of perennial sources. This is not a comprehensive list of Wikipedia's sources, nor is it a comparison or evaluation of reliability between sources. It exists so that Wikipedia editors can reference prior discussions about how a specific source should be used on Wikipedia at a point in time.

How does Wikipedia protect against bias?

Wikipedia articles are a perpetual work in progress, and so Wikipedia has many layers of oversight that prevent bias or personal opinions from influencing content.

As noted above, because Wikipedia is an encyclopedia, its policies require that all content be written neutrally, in line with information from reliable sources. Volunteer editors from all backgrounds are invited to work collaboratively to ensure balanced coverage. Violations of Wikipedia policies are addressed openly, through public and well-documented processes.

Wikipedia informs; it does not persuade. Every reader on Wikipedia can evaluate the information being presented and look directly at its citations and sources to draw their own conclusions. Readers who would like to see other sources and information on Wikipedia are encouraged to participate in editorial discussions, propose improvements, and use Wikipedia's reporting tools when they believe its policies are not being followed. Collaboration, engagement, and publicly transparent debates on Wikipedia are the most effective way to maintain its integrity and improve it.

Wikipedia's strength comes from inviting people of all backgrounds, political beliefs, and regions to participate in building and maintaining content. By including a wider range of contributors, Wikipedia becomes a more accurate, balanced, and trustworthy resource for all. For example, studies have shown that when a larger number of volunteer editors contribute to a Wikipedia article from diverse political viewpoints, it produces higher quality articles. Through these efforts, volunteers from all walks of life and hundreds of languages come together to share in Wikipedia's mission of creating the sum of all knowledge.

Why is user privacy important?

Privacy protections on Wikipedia help protect both readers and the volunteers who contribute to the project. Editors are not required to use real names or disclose personal information. They may instead contribute under user names, which is designed to limit the risk of harassment, doxing, or retaliation-particularly for those addressing controversial topics or living in places where free speech has restrictions.

These privacy features extend to readers as well: Wikipedia does not require an account to view its content and it does not collect unnecessary personal data, ensuring that information remains accessible and safe for everyone reading Wikipedia around the world.

How do generative AI tools use Wikipedia?

Wikipedia is one of the highest-quality datasets available, which is why many generative AI tools use it as part of their training data. It is the only site of its scale with content standards that protect information integrity. Research confirms that when AI models exclude Wikipedia, the quality and reliability of their information decline. That being said, no single source of data can dominate AI outputs and companies choose how content is used in their AI tools and models. We encourage the further development of attribution standards in AI tools to help users understand and verify the sources that are being used to create AI-generated information.

Why can information on Wikipedia be trusted?

Every edit on Wikipedia is publicly recorded and available for all to see. Discussions about the reliability of a source, decisions on content, and updating editorial policy all happen publicly to create clear accountability. Wikipedia editors engage with feedback openly, and strive to constantly improve this living encyclopedia.

Transparency-combined with community oversight mechanisms and clear rules for sources-has made Wikipedia a trusted reference for audiences across ideological divides. Wikipedia demonstrates how hundreds of thousands of people from all walks of life can effectively reach consensus.

In a time of declining trust in the media and the rising politicization of knowledge, Wikipedia provides a foundation for reliable, balanced information-and invites everyone to help keep it that way.

You can read more about how Wikipedia works on our FAQ page.

About the Wikimedia Foundation

The Wikimedia Foundation is the nonprofit organization that operates Wikipedia and other Wikimedia free knowledge projects. Our vision is a world in which every single human can freely share in the sum of all knowledge. We believe that everyone has the potential to contribute something to our shared knowledge and that everyone should be able to access that knowledge freely. We host Wikipedia and the Wikimedia projects; build software experiences for reading, contributing, and sharing Wikimedia content; support the volunteer communities and partners who make Wikimedia possible. The Wikimedia Foundation is a United States 501(c)(3) tax-exempt organization with offices in San Francisco, California, USA.

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Wikipedia - Wikimedia Foundation Inc. published this content on October 10, 2025, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on October 10, 2025 at 16:53 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]