Azure ExpressRoute is a service that allows businesses to create private connections between their on-premises networks and the Microsoft Azure cloud. This connection bypasses the public internet, providing more reliability, faster speeds, and enhanced security for data transfer. With Azure ExpressRoute, organizations can extend their existing networks into the cloud seamlessly. It supports various connectivity options, including point-to-point, any-to-any, and cloud exchange, making it flexible for different business needs. This service is ideal for companies that require consistent performance and secure data handling for their applications and workloads.