Wheels with a full axle are better than those bolted to the frame, which can bend eventually. Gas and electric grills generally have one or more shelves , which flip up from the front or side or are fixed on the side. Shelves are usually made of plastic. A few are made of wood or stainless steel. Plastic and stainless steel are more durable choices.
Interior racks keep food warm without further cooking.
Most gas grills come with an igniter , either a knob or a push button. Battery-powered electronic igniters produce continuous sparks as long as the button is held down. Most grills have lighting holes on the side of or beneath the grill that can be used when the igniter fails. More burners can add more cooking flexibility. Burners are typically steel.