The picture gives information about the right typing position.
For the first half of the picture, it is clear that the wrist and the palm should be straight and horizontal. Excessive motion of the wrist should be avoided.
For the second half of the picture, we need to make sure that the wrist and the lower arm are straight as well, and the fingers need to be slightly curved.
Apart from that, the keyboard needs to be flat. Do not prop up the back of the keyboard.
In conclusion, if we follow the instructions provided, we can type faster without causing pain in the wrist or hand.