When we consider the development in education and communication technologies, internet appears as the most important tool of communication. Web 2.0, which is the one of the stages of development, prepared a good ground for multiple sharing application and personal social communication. In this article, some information is given about Wikis, one of the web 2.0 applications; what Wiki is, its general properties, its use in education, and the problems In its use. The usage of wikis in our country and the place of wiki in teaching & learning activities and lifelong learning are discussed. (C) 2011 Published by Elsevier Ltd.