Depends where you are. it is known in the US, and its popular with people from the rest of the UK.
It does not seem to be much known in Asia, apart from as the source of whiskey.
I do not about the rest of Europe, but my feeling is that it is not well known.
I have been quite surprised how many people (from Asia and Europe) can visit, or even live in, the UK and not go out of London.
While Scotland is not unknown, there are certainly a lot of people who might visit who have a low awareness of what is there, and articles like this show some very attractive aspects of Scotland.