A wiki is a website that allows users to collaboratively edit its content and structure asynchronously. Wikis can range from a single webpage to a complex network of interconnected pages. They are commonly used for collaborative projects. Educators have found wikis useful for activities like brainstorming, collaborative writing, and group projects. Wikis provide functionality like page creation, linking, change tracking, and user account management that facilitate collaborative work. Effective use of wikis may require instructional support and addressing initial usability challenges.