What do the Three Crowns symbolize in the coat of arms of Sweden?

Three Crowns (Swedish: tre kronor) is a national emblem of Sweden, present in the coat of arms of Sweden, and composed of three yellow or gilded coronets ordered two above and one below, placed on a blue background. [Union of Magnus Eriksson] Magnus used the symbols frequently, probably to mark his three kingdoms; Sweden, Norway and Scania. At the middle of the 14th century, neighbouring Denmark's severe financial problems caused most of the country to be pawned to German princes, primarily Gerhard III and John III.