What is the origin of the idiom "wear many hats" and when to use it?

The phrase "wear many hats" originated in the early 20th century and referred to the practice of wearing different hats to represent different roles or occupations. The term "hat" is used metaphorically to represent different responsibilities or tasks. It is often used in work or professional contexts, where someone may need to perform different tasks or take on different roles in order to achieve their goals.