The three rounded arms of the trefoil brooch served primarily as a functional and aesthetic element of women's clothing during the Viking Age, used to fasten cloaks or necklines, while simultaneously acting as symbols of social status and wealth. Regional variations in ornamentation stemmed from the use of different Norse art styles, such as the Borre, Jelling, or Urnes styles, characterized by distinctive motifs like raptors, intertwined knot patterns, or geometric ornaments.