What are high beams used for? High beams provide bright light for you to see further. Unlike low beam lights, high beams never turn on automatically. They must be opened manually by the driver when needed. It is mainly used for driving on dark roads such as country roads or areas with poor visibility if there are no other vehicles around.
Now read along for more details for the question "in which situation you should use high beams".
On Country Roads and Rural Areas with Sparse Street Lighting
On country roads and rural areas with few streetlights, driving in the dark is very dangerous. Besides, there may be animals walking late at night on country roads. High beams allow you to see further so that you can react timely if you see something, making sure your high-speed driving safer.
While country roads may seem deserted, be prepared to quickly dim your high beams when approaching a vehicle.