DoorDash operates a food delivery marketplace connecting restaurants, delivery drivers and customers, and has expanded beyond restaurant delivery into grocery, retail and convenience store delivery as well. The company takes a commission from restaurants and delivery fees from customers on each order, with profitability depending heavily on order density in a given market, since more orders in a concentrated area let delivery drivers complete more deliveries per hour worked. DoorDash competes with Uber Eats and other delivery platforms in a market where offering the broadest restaurant selection and fastest delivery times matters for winning customer loyalty. The company has also built an advertising business, letting restaurants pay for better placement within the app, an additional high-margin revenue stream layered on top of its core delivery commissions.