An official residence is a special house where important people such as Presidents, Governors, Ambassadors, or other government officials can live and work. It's kind of like a fancy, important house. It is used for hosting events, receiving guests, and working on official government business.
It is usually owned or rented by the government, and they pay for the costs of things like maintenance, cleaning, and utilities. It is often equipped with special features such as security systems and meeting rooms. These features help to keep the people inside safe and secure while they work on important government matters.
So, when an important person is required to live somewhere while working for the government, they stay in an official residence!