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We mean someone who is really good at doing what they do. What makes a person good at their craft is when they understand the possibility that things can go wrong but don't allow setbacks to deter their determination

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It is when somebody applies effort into their job and use their experience towards an experiment. This makes someone very "good at their craft" after a certain time of practice. JJ

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It means they are good at there hobby your craft is not your job its something you find fun and your good at. Like being good at back flip is not a job.

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When someone says "they're good at their craft" we're really saying that it's an acquired skill. Practice and experience is what makes a person really good at their craft.

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When we say that someone is good at their skill, i think we're saying that their good at what they do, like their job or what they do in life or if someone is a in entrepreneur you would say that their good at their bushiness or their "craft".

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We are saying that they are good at what they do, if they worked as a lawyer we would say they are good at their craft.

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I think the meaning of the saying "good at their craft" means that they are good at their job or hobby. Somebody who really knows their craft can teach it to others easily.

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We are saying that they are really good at their job and we could tell they have been doing it for a while. What makes someone good at a craft is practicing it a lot and doing it for a long time for the experience.

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Some people have unique skills that they practiced to get good at, or they are born with the skill. A lot of people work very hard practicing their skills/tricks, for example; a back flip usually takes a bit of practice.