Which component is not typically used in the decoration of cakes?

The correct choice indicates that a cake board is not typically used as a decoration for cakes. A cake board is a sturdy base on which a cake rests to provide support and stability during transportation and presentation. While it plays a crucial role in the overall presentation of a cake, it is not considered a decorative element itself.

In contrast, marzipan figures, greetings (such as inscriptions), and edible glitter are all directly associated with the decorative aspects of cakes. Marzipan figures can be molded into various shapes and themed designs, enhancing the visual appeal. Greetings, either piped or printed, are added to convey messages or celebrate occasions. Edible glitter is often used to add a touch of sparkle and attract attention. Thus, while a cake board serves functional purposes, it does not contribute to the aesthetic appeal of the cake in the same way that the other components do.