What is a wiki?

A wiki is defined as a website that allows users to collaboratively create, edit, and manage content. This collaborative nature is one of the defining features of wikis, making them distinct from other types of websites. Users can contribute their knowledge, edit existing entries, and work together to build a collective repository of information. Wikis often emphasize ease of use, allowing even those with little technical expertise to participate in content creation and organization.

For instance, platforms like Wikipedia exemplify this concept, where a vast number of contributors add to and update articles on various topics. This participatory approach encourages a community-based effort in knowledge sharing, which is an essential characteristic of wikis. The other options do not capture this collaborative and editable nature that defines what a wiki truly is.