1. They allow to reduce the impact of solar radiation. Not only to create shade in the garden, but also to protect the walls from overheating and prevent the temperature rise inside. This is achieved by redirecting the sun's rays with an awning so that they do not affect the walls. 2. They help maintain the external furniture. If the pergola is covered by an awning, hurdle, etc. It will reduce the humidity of the rain and the sun that reach the furniture placed outside. In th