How does gaming mode work for Windows updates

Gaming mode claims to stop Windows update from interfering with what your doing. My question is how does this work on windows 10, does it change the active times for Windows.

Or does it use another method.

I received the large update to Windows 10 yesterday and avast wasn’t interfering/doing anything to/with it.

Gaming mode only works when your playing a game or running program added to it’s list, which is why I asked how it works since it says it stops Windows updates, was wondering how that worked in windows 10