Since there’s a lot of wrong info in the responses… snus is the word for snuff in Sweden and traditionally had an extra sanitization step (boiling IIRC), which

Since there’s a lot of wrong info in the responses… snus is the word for snuff in Sweden and traditionally had an extra sanitization step (boiling IIRC), which was different enough that it became it’s own term, because quality was better. Snus is almost universally used under the lip, but I think used to be used nasally too. Snuff is just the English name, and can refer to nasal snuff, dip, pouches. Just means it’s ground up tobacco and isn’t anymore specific than that. Regionally it means whatever way of using it is most common. Basically it’s confusing in the same way if you ask and American or European about football. Technically the word is not specific but it has very strong regional definitions