A Ramada is typically found in the desert southwest and used as a shaded area to protect you from the sun in the heat of the day.  It is a structure with a roof, but without walls.  Because there are no walls in these structures, airflow is unrestricted, helping to keep the temperature below the roof substantially cooler than ambient.  In late spring, summer and early fall, your Ramada will allow you to comfortably use your backyard entertaining areas.