What is the best grill grate material?

Cooking grates are an essential part of your bbq grill, and whether it is a gas grill, charcoal grill or electric grill… you will need grates. Simple. They are usually already provided with your grilling unit and you probably considered the grates’ material while choosing your bbq, but did you dig further into what types of grill grate materials are there? And which one is the best grill grate material ?