The food is made for entertaining tastes. The tastes of foods are determined by talent of cook, and when their talent created mixture of various tastes into one artistic craft, people like it much and the restaurant is known to people with fame. The food is made for entertainment purpose, and there are many terms to describe tastes of food.
The Korean term 단 맛 is in English sweet taste. It is usually tastes of sugar put to foods. The Korean term 짠 맛 is salty tastes. The both of the term is used frequently for describing culinary tastes, very popular terms they are.
How about one food has sweet tastes and salty tastes? Imagine caramel with salt on it. It is delicate taste, two often conflict tastes but it is really sensational. The term “sweet and salty tastes” can be translated to Korean term “단짠단짠” which is meaning same thing and added rhythmical reading on it.
In entertainment purpose, its rhythmical sound is making it popular term, well-used in television program introducing culinary menu to viewers.