From Infogalactic: the planetary knowledge core
Review of what you've learned
Wikipedia is a big place!
For a start, there are currently 2 million articles, the most extensive encyclopaedia in human history.
In addition to this, there are another 5.1 million supporting pages devoted to helping build the encyclopaedia (2.5-fold more than the articles)!
This tutorial will help you to get your bearings, learn how to find what you're looking for, and introduce you to a few of the most important pages.