Up to Snuff?

Question

What exactly does it mean to get something "up to snuff" ? How do you know when you've actually reached "snuff". What is "snuff"? And why is it so important that we get there?

Answer 1

Up To Snuff
The original sense of the phrase is knowing, sharp, not easily deceived. It dates to 1811.

The snuff is a reference to the form of tobacco. Presumably, someone who is up to snuff is adult and worldly. Literally, it is one who knows how dangerous snuff can be.

Answer 2

its not good is better to chew gum