Designed for the English language, it's easier to learn if you don't already know qwerty, and it's better for comfort and letter accuracy. But switching isn't easy to re-learn, and hard to integrate into a qwerty world. I knew it many years ago, but haven't used it since.
QWERTY = the keyboard you likely use now. It's called that because the upper left of the keyboard has those as the first 5 letters. So dvorak is I guess the first 5 in that keyboard, arranged that way for easier typing of some words. I don't think I could adjust to it
A Dvorak keyboard designed for speed typing. The Dvorak keyboard was designed in the 1930s by August Dvorak, a professor of education, and his brother-in-law, William Dealy. Unlike the traditional QWERTY keyboard, the Dvorak keyboard is designed so that the middle row of keys includes the most common letters. In addition, common letter combinations are positioned in such a way that they can be typed quickly.