What is a wiki? Describe the guidelines that need to be followed for wiki writing.

Answers will vary. A wiki is a collaborative website that hosts the collective work of many authors. Similar to a blog in structure and logic, a wiki allows anyone to edit, delete, or modify content, even the work of previous authors. While allowing everyday users to create and edit a website encourages cooperative use of electronic information, the content posted at such sites should not be considered authoritative. When wiki writing, avoid the first-person blogging style and conform to the tone and flow of the existing article. Wikis are not typically the place for personal opinion and analysis. Hence, present factual information in clear, concise, and neutral language.
Many businesses make use of wikis to encourage free flow of ideas within the organization. Content in a wiki can be updated in real time, without any real administrative effort, and without the need for deliberate distribution. Contributors simply visit and update a common website. Wikis facilitate the exchange of information within and between teams. They allow maintenance of a series of unique documents with evolving content. Placing a document in a wiki does not necessarily make it editable by everyone with access to the wiki. Most companies implement their wikis behind a firewall to limit participation to their internal user base.