Activating Assist with headset, earbuds or headphones on Android?

Hi all, was just wondering if anyone could elaborate more on this, as i can’t find much, except in the latest Android app release notes. What exactly does the activating Assist with a headset button mean? What sort of headsets are possible to use? Does it only work with headsets, or earbuds as well?

Know this has been a bit but Can confirm works with tap on right Raycon earbud. So if anyone can confirm whatever signal that is. That works.

Now my wife says I look like an idiot tapping my head and talking to myself but that’s a completely different issue…