What does it mean if a material is a good conductor?

A material is considered a good conductor if it allows the flow of electrical charges, such as electrons, with little to no resistance. This means that electric current can easily pass through the material, resulting in efficient conduction of electricity. Good conductors typically have a high number of free electrons that are loosely bound to their atomic nuclei, allowing them to move freely through the material. Common examples of good conductors include metals like copper and aluminum.