Turning off the router at night provides very limited energy savings and does not improve health or clearly extend the lifespan of the device. Leaving the router on ensures the continuous operation of home automation, security, automatic updates and landline telephone on fiber. It may be tempting to turn your broadband router off overnight, but it's a bad idea for several reasons. However, it is optional to keep it switched on all night. It may include saving electricity costs, unauthorized usage, or avoiding any incident, which may be true. There are arguments to be made on both sides of the issue, and ultimately, the best decision for you will depend on your individual needs and circumstances.