They are purely decorative.
If you mean the cone shaped hat with tassels, then the plural word is fezzes.
Somewhere I had heard that the tassels represent prepared rifle loads that were carried for hunting and battle.
The tassels on a Shriner's fez are traditionally pinned down as a symbol of respect and discipline. It helps maintain a neat and uniform appearance among members during ceremonies and events.
Tommy cooper wore a fez. Its' like a red, mini bucket with tassels on the top of it.
Tassels are often seen as symbols of achievement, honor, or celebration. In some cultural contexts, tassels may also represent status, wealth, or religious significance. They are commonly used on academic regalia, military uniforms, and decorative items.
Tassels in the Air was created in 1938.
A fez in Doctor Who is a hat.
The Fez was created in 1976.
Morocco
YouTube has several video tutorials about making tassels. How to Make Tassels has a detailed website about this project. Tammy Mitchell Photography also has a video about making tassels.
Men wear a fez.
Men wear fez on head. Women do not wear them.