A lightning arrester is a device designed to protect electrical systems from the damaging effects of lightning strikes. It works by providing a low-resistance path for the electrical surge, directing the energy safely into the ground. This helps prevent damage to buildings, power lines, and electronic equipment. Typically installed on rooftops or utility poles, lightning arresters are crucial for safeguarding infrastructure. They are often used in conjunction with other protective devices, such as surge protectors, to enhance overall safety. Proper installation and maintenance of lightning arresters can significantly reduce the risk of fire and equipment failure caused by lightning.