What is a split keyboard?

A normal keyboard consists of a single part. A split keyboard acts just like a normal keyboard, but consists of two parts instead.

If you imagine typing with proper form, not looking at the keycaps, your fingers will all be on the home row. On a common QWERTY layout, that means your fingers would be on the ASDF and the JKL; keys. Because they're pretty close together and because a common keyboard is rectangular, this puts both your wrists and shoulders at an angle, which can cause stress on your joints and muscles.

With a split keyboard, you're free to reposition both parts of the keyboard. This allows you to put them closer together or further apart, depending on the width of your shoulders. It also allows you to adjust their angle, so you're always able to find a position that's comfortable and without any stress.