What is Wikipedia?
Wikipedia is a free encyclopedia, written collaboratively by the people who use it. It is a special type of website designed to make collaboration easy, called a wiki. Many people are constantly improving Wikipedia, making thousands of changes per hour. All of these changes are recorded in article histories and recent changes. For a more detailed account of the project, see About Wikipedia.
How you can contribute
Don't be afraid to edit – anyone can edit almost every page, and we are encouraged to be bold! Find something that can be improved and make it better—for example, spelling, grammar, rewriting for readability, adding content, or removing non-constructive edits. If you wish to add new facts, please try to provide references so they may be verified, or suggest them on the article's discussion page. Changes to controversial topics and Wikipedia's main pages should usually be discussed first.
Remember – you can't break Wikipedia; all edits can be reversed, fixed or improved later. Wikipedia is allowed to be imperfect. So go ahead, edit an article and help make Wikipedia the best information source on the Internet!
At Wikipedia, 150 dedicated people serve 450 MILLION users.
If this is not leading by serving, I don't know what is.
Wikipedia is one of our most important resources of free information.