What is the difference between stock and broth, and how does their quality impact the flavor of a dish?

Stock is made by simmering bones, vegetables, and aromatics in water, while broth is made by simmering meat and vegetables. Stock tends to have a richer, more intense flavor due to the collagen released from the bones, while broth is lighter and more meaty. The quality of stock or broth can greatly impact the flavor of a dish, as a well-made stock can enhance the overall taste and complexity of a dish, while a low-quality stock or broth may result in a bland or unbalanced flavor.