Okay ~ calm down it is nothing sinister.
Many people (Woodstock to name but one) can touch type. That means they don't need to look at the keyboard. They start by placing their fingers on the keyboard in a preset position and one finger from each hand is placed on the key with the "Blip". They can read a document and type it at the same time using all 8 fingers and both thumbs as they have been trained to do this. Each digit goes automatically from the "Set Position" which is established as they start by feeling the "Blips" with the index finger of each hand. The F & J keys are known as the home keys and the F is for their left index finger and the J for the right index finger. These two fingers always return to the "Home Keys" whilst the other fingers roam all over the keyboard, hitting the right letters. Left hand covers everything left of H whilst the right hand operates on the other side of the keyboard. The right hand also used to fling the return lever on the roller that held the paper on typewriters but now the little pinky on the right hand hits the return (or enter) key.
In days gone past, before every one had a PC on their desk Secretaries would use this touch typing method to type at speeds far in excess of those we mere two and three fingered pooter punchers can achieve.
Woodstock paid for lessons to learn the art of touch typing when she first entered the world of work in order that she would have additional qualifications whilst job searching. Once learned they never forget how to do it.
Some blind people can use the same method and do use the same "Blips" to position their index fingers before they start.
