This document provides an overview of wikis and their essential functions. It explains that a wiki is a website that allows users to easily add, edit, and modify content. Wikis are used in business and education settings for collaborative work. They enable efficient and fun collaboration through features like discussion forums, polls, and multimedia. The document outlines the essential functions of wikis, including registering, writing personal information, searching, editing pages, using tags and categories, creating links between pages, and using plugins and variables. It encourages readers to explore the wiki's functionality and documentation.