This document discusses wikis, including what they are, why they are useful, and how to choose and use them. A wiki is a type of website that allows collaborative editing of its content and structures. Wikis enable knowledge power, more accurate information through open collaboration, and institutionalization of expert knowledge. They have features like page creation, searching, viewing histories, easy navigation, links, and uploading files. Choosing a wiki depends on whether it is hosted or installed, with considerations including setup ease, storage space, customization, and security needs depending on the scenario. Wikis can be useful for businesses for shared repositories, knowledge management, training, and web publishing to replace other programs. However, they may not be suitable