What is 1 g on a Coin?

Could you elaborate on the meaning of "1 g" on a coin in the context of cryptocurrency and finance? Is this a reference to a specific unit of measurement, such as grams of a physical commodity backed by the coin? Or is it a shorthand for some technical term related to cryptocurrency? Additionally, could you provide some context for why this information is important or relevant to investors and cryptocurrency enthusiasts? Understanding the significance of "1 g" on a coin would greatly enhance my knowledge in this field.