A cloud kitchen, also known as a virtual kitchen or ghost kitchen, or a restaurant concept where food is prepared and delivered to customers exclusively through online platforms such as food delivery apps. 

Cloud kitchens typically do not have a physical storefront or dining area, and customers place orders and pay through an app or website. 

Food is then prepared in a central kitchen and delivered directly to the customer’s location.

Cloud kitchens are becoming increasingly popular in urban areas as a way for businesses to reach customers in a more cost-effective and efficient way. 

They are also beneficial for restaurants as it helps them to reduce the operational costs like rent, maintenance, and labor.