Definition & Meaning of "a barber learns to shave by shaving fools"

What is the origin of the proverb "a barber learns to shave by shaving fools" and when to use it?

The origin of the proverb "a barber learns to shave by shaving fools" is not clearly tied to a specific source, but it reflects a piece of traditional wisdom found in various cultures. It emphasizes the importance of gaining experience through trial and error. The proverb implies that everyone must start somewhere and learn by doing, even if the initial steps may not always be perfect.