A courtyard is an enclosed and private space surrounded by buildings or walls that allows to see the sky. In the past it was used for cooking, working, playing, keeping domestic animals. Nowadays modern houses need a space where to have privacy, light and air.
It's a place where to relax oneself, especially in densely populated areas. Have a private space in big cities is very important, it's a place where a family can have privacy, a safe place for children, a place where have breakfast or dinner during summer period.
This is one of the most request from clients who are buying a property abroad.