Azure ExpressRoute  is a cloud-integrated solution for creating fast and secure private connections between Azure and local data centers.

Azure Express Route allows a private connection between an on-premises data center local network and the Microsoft cloud.

Azure Express Route allows organizations to connect to Microsoft cloud services anywhere in the world

Azure Express Route   improves security and privacy by avoiding sensitive traffic going over the public internet

Azure Express Route  is Microsoft's recommended method of accessing resources in Azure over a private connection.