What does proficiency with Dice set do?

@JeremyECrawford What does proficiency with Dice set do?

— Jeromy D'Amico (@Herodragon33) December 8, 2015

Proficiency with a dice set lets you add your prof. bonus to checks you might make while playing dice games. #DnD https://t.co/S3sPXINzlR

— Jeremy Crawford (@JeremyECrawford) December 8, 2015

@Herodragon33since dice games are mostly change it would only help with determining odds or cheating? Determining odds, cheating, and mastering the rules of the game being played.

— Jeremy Crawford (@JeremyECrawford) December 8, 2015