A dust ruffle is a decorative bed skirt that is used to hide the base of the bed. There are several synonyms for the word dust ruffle, with the most common ones being bed skirt, bed valance, and bed apron. Some people also refer to it as a bedspread or bed sheet. The purpose of a dust ruffle is to add a finishing touch to the bedding ensemble by giving the bed a more polished and elegant look. It also helps to protect the mattress and box spring from dust, dirt, and other particles that can accumulate over time. Whatever you call it, a dust ruffle is an essential part of any well-dressed bed.