A rug decorator is a person who specializes in the design and decoration of rugs. A tasseler is a specific type of rug decorator who adds tassels to the edges of rugs. Tassels are decorative fringes that are usually made from yarn or fabric and are used to add texture and color to the rug. Tasselers use a variety of techniques to create the tassels, including knotting, braiding, and weaving. They also use a variety of materials, such as wool, cotton, and silk, to create the tassels. The tassels can be used to create a variety of patterns and designs on the rug.