Snuff is a kind of tobacco that you don't smoke. Instead, you sniff it up your nose using a special tool called a snuffbox. It's like you are smelling something nice or sneezing, but with tobacco.
People have been using snuff for a very long time. It was popular in Europe and the Americas in the 18th and 19th centuries. Some people still use it today, but not as many as before.
When you sniff snuff, the nicotine in the tobacco gets absorbed into your body very quickly. This can make you feel alert and energized. However, snuff can also be harmful to your health, just like smoking. It can cause cancer and other diseases. So, it's better not to use snuff.