Article: Laws governing tobacco products cover smokeless tobacco. In December 2019, the federal minimum age was raised to 21 in all US states.  Smokeless tobacco is a legal product, but you don't want to enjoy it while breaking the law by pretending to be of age, or purchasing it for someone who is underage. There are a variety of smokeless products out there. Their use is pretty similar, so your preference will really come down to personal taste.  Moist snuff. This tobacco has been fermented, aged, and finely chopped up. It is packed into tins. As the name suggests, this is slightly moistened, as opposed to dry snuff, which is powdery, and can be taken by sniffing it into your nose. This is the most common form of dipping tobacco sold in the US, and the kind you are most likely to see in stores.  Loose-leaf tobacco. Another common form of chewing tobacco, these leaves have been dried and fermented, then sold in foil packets.  Plug tobacco. In this form, the tobacco has been packed tightly together with molasses, or some other adhesive, into a block. You'll either cut or bit off a piece of the block to use it. You may also find twist tobacco, which a similar form where the tobacco has been braided into long strands.  Snus. This is a newer form, originally developed in Scandinavia. The tobacco is put in individual packets, and may be flavored with a variety of sweeteners. There are differences between snus made in the United States compared to countries like Sweden, such as amount of tobacco in a packet, which can lead into differences in physical effects on your mouth. Compared to smoking, there are fewer restrictions on where you can use smokeless tobacco. Because you are going to be spitting, though, you will want to be somewhere where you can do that politely, or at least have a bottle or something you can spit into.  You don't want to be doing something physically active, as you'll want to avoid accidentally swallowing the tobacco or your spit. A relaxing activity like reading, watching television, or hanging out with friends, can be a good complement to dipping. Avoid doing other things with your mouth while dipping, like eating or drinking. You don't want to mix your food with the dip.

What is a summary?
Be of legal age to purchase tobacco. Decide what kind of smokeless tobacco you want. Get somewhere you can use the tobacco.