Cast iron has always been known to have a few advantages over other types of cookware. Its material and weight give it excellent heat retention for high-heat cooking techniques such as frying and searing. You can use it on the stovetop or bake with it in the oven. Its durability is legendary—many people are still cooking with cast-iron pans handed down for generations. Unlike most consumer products, cast-iron pans actually improve with time and heavy use.