On Wikipedia, advertising may refer to:
- Wikipedia:What Wikipedia is not § Wikipedia is not a soapbox or means of promotion, policy on Wikipedia not being used for advertising
- Wikipedia:Spam, guideline on how to avoid different types of spam in Wikipedia articles
- Wikipedia:Perennial proposals § Advertising, about the perennial proposal to fund Wikipedia through advertising
- Wikipedia:Funding Wikipedia through advertisements, essay on whether Wikipedia should carry advertising
- Wikipedia:Publicising discussions, guide on how to advertise discussions inside Wikipedia
- Wikipedia:Wikipedia ads, banner-style advertisements for internal Wikipedia projects and practices
- Wikipedia:WikiProject Marketing & Advertising, a wikiproject for improving coverage of encyclopedic articles dealing with marketing
- Wikipedia:WikiProject Spam, where to report advertisement spam found on Wikipedia
- Wikipedia:FAQ/Readers § Why do I see advertisements in Wikipedia?, explanation that malware on the reader's computer or a fork hosted by someone else may display ads
- Wikipedia:Identifying blatant advertising, an essay on how to identify articles and talk pages that are blatant ads
- Wikipedia:Criteria for speedy deletion#G11, the speedy deletion criterion on advertising