What is a Wiki
From Wikipedia : "A wiki (WIK-ee) is a website which invites all users to edit any page or to create new pages within the wiki Web site, using only a plain-vanilla Web browser without any extra add-ons. Wikis are powered by wiki software. Most are created collaboratively. "Wikis serve many different purposes, such as knowledge management and notetaking. Wikis can be community websites and intranets, for example. Some permit control over different functions (levels of access). [...] "Ward Cunningham, the developer of the first wiki software originally described it as "the simplest online database that could possibly work." "Wiki" is a Hawaiian word meaning "fast" or "quick".
Wikis are often adopted by agile teams to remove communication bottlenecks and allow team information to be added or updated in real time by any trusted member of a team. Some teams also hold asynchronous discussions on their wikis.
"My discovery of Ward's wiki was my first window into the world of software agility ... it was at first a shock, then a puzzle, and then an invitation to find and work with the kind of passionate people who would build such a conversation. Looking back. it was the first big cultural paradigm-shifter for me! And look where it's led me!" -- Dpreuss (talk) 16:20, 15 April 2013 (CEST) ( check it out :-)