The Danish is a small breakfast pastry that typically contains a creamy cheese or a sweet fruit filling. Traditional Danishes are labor intensive; unless you are making them commercially in large batches, making them will take you the better part of the day to create all the components necessary for the filling and dough.
I don't know about you, but I just don't have the time to spend part of a day on one pastry! A very quick and easy solution to this problem is "puff pastry". Making puff pastry from scratch is a true art and takes a considerable amount of time and ingredients. There are just not many great commercially made puff pastries on the market today (Even the professionals utilize these pre-made shortcuts!)