What on Wikipedia may refer to the following:
- What Wikipedia is not; list of things Wikipedia is, and things that Wikipedia isn't;
- What is an article?; Wikipedia articles – what are they?;
- What adminship is not; an essay summing up points of what Wikipedia's requests for adminship process isn't;
- What "Ignore all rules" means; more detailed information about what Wikipedia's policy "ignore all rules" means;
- What the GFDL is not; list of things the GFDL license is, and things that the GFDL license isn't;
- What Google liked; a now inactive page listing some of the most highly viewed pages that link from search engine giant Google;
- "What is a ..." may also refer to many different criteria guidelines:
- What Wikipedia Wants; a rejected proposal, outlining content that Wikipedia wants in articles;
- What You Need To Know About Cancer booklets; public-domain text available for use on Cancer-related articles;
- What administrators do; outlining details of what the job of an administrator entails;
- What is a troll?; help resource for "troll"-related issues;
- What is a wiki for; what exactly is a "wiki", and why is the Wikipedia a "wiki"
- What Would Britannica Do; how would the editors of Encyclopedia Britannica and other encyclopedias do in the situation, or how would they write a certain piece of content;
- What claims of relevance are false; an essay with guidelines on determining whether a certain "claim of relevance" is false, or otherwise;
- What would Jack do?; similar to the Britannica essay above, instead asking the question "What would Jack do?" (Jack, in this case, is a trusted and respected editor); or
- Why was my page deleted?; guidelines for answering the question "Why was my page deleted?".