The founder of Wikipedia urges students not to use it as an academic source.
If you've 'Googled' any topic recently, you've probably found links to Wikipedia near the top of your results list. Wikipedia is a free online encyclopedia that differs from other encyclopedias in a significant way: along with reading the articles in Wikipedia, anyone can add or edit articles however they like. According to their website, Wikipedia was created in 2001 and has since grown to be one of the largest sites on the web, passing one million entries in the English-language version of the encyclopedia in March of 2006. It is a collaborative effort with articles written by individuals from around the world using wiki software that allows content to be added or changed by anyone.
As a result, Wikipedia is a dynamic work that is always growing, always changing.