Quite prevalent this stuff, especially where I play golf.
Apparently, some of the better juniors (teens) use this as it gives them clarity and focus! And adults of course.
There are discarded tabs all over the course.
The times I've tried them I've felt off my head, genuinely. I guess if you use regularly you get used to them.
My fiance, as all Norwegians do, uses it and it's nearly impossible to quit.
I've tried it twice and nicotine sickness came after about 10 minutes. This is apparently standard and you simply develop an extreme tolerance.
They have flavours, blends etc. But it's essentially: a brown packet, which is pure tobacco, white essentially menthol and then "loose snus" which is just unpacked you shove up your gums.
I don't see the appeal, but I never really saw the appeal of smoking either. So what do I know.