Umm that's 3 questions...
It's a penicillium mould called a bloom, which has either been added to the milk or sprayed onto the moulded cheese. It is used to keep the cheese fresh
No. The bloom is quite safe to eat and adds to the flavour of the cheese. Gives it a nice bitterness and makes the wine you are sipping absorb to your taste buds better
Buy it, open it, drink it and let us all know!