Using candy or sweets as a reward for children?

Is it a bad or good parenting tactic to use candy or sweets as a reward for children? Could this create a unhealthy craving for candy and sweets as a adult?

When they reach a age where they can eat whatever they want could this make them over indulge in candy and sweets to a unhealthy point?

Or do you think it will have no effect on their eating habits as a adult? Or a positive effect of only reaching for these snacks occasionally as a reward for themselves?

What’s your opinion on using candy or sweets as a reward for children? Is it a good idea, bad idea, or doesn’t matter either way?