It's weirdly phrased, but I think they're talking about haptic feedback to simulate the feeling of a physical button.

I think maybe they mean what used to be a physical button click sound and feel, some feedback is important :)

It can be incredibly convincing too, for example using the steam controller with headphones. I've had it for months and only just realized what I thought was a physical detent in the trigger was actually adjustable haptic feedback.