Canned mustard, also known as prepared mustard, serves primarily as a condiment. Its main function is to add flavor and tanginess to various dishes. It's commonly used as a spread on sandwiches, hot dogs, and burgers, as well as a dipping sauce for pretzels, fries, and other snacks. Additionally, it can be used as an ingredient in salad dressings, marinades, sauces, and glazes to add depth and zing to the flavor profile. Canned mustard comes in various types and strengths, such as yellow mustard, Dijon mustard, and spicy brown mustard, offering versatility in culinary applications.