Difference between "down" and "up" outputs

The Keyboard block has two outputs, down and up. What’s the difference between these two outputs? (And for other blocks with it too)

down means when you press the button assigned up means when the button assigned isnt pressed

The “Down” output activates when the key is pressed.
There is an option to have this output only one time or the entire time the key is pressed.
(This option is called “Repeating”)

The “Up” output activated once the key is no longer pressed.

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There is an option to “Activate on any key”. Selecting this will cause the “Down” output to output Text (the Text will be whatever key you pressed)

If you click on the behavior, there should be a option called “Help” which will show you an example how the behavior can be used.