Why did barmaids wear arm bands or garters?

Barmaids wore armbands or garters as a way to signify their employment and to distinguish themselves from patrons in pubs and taverns. These accessories often indicated the barmaid's role and status within the establishment, serving as a visual cue for customers. Additionally, armbands and garters could also serve practical purposes, such as holding up sleeves or keeping hair in place, while enhancing the overall appearance of the barmaid.