Azure Virtual Network is a cloud service provided by Microsoft Azure that allows users to create private networks in the cloud. It enables secure communication between different resources, such as virtual machines and applications, while isolating them from the public internet. This helps organizations manage their network infrastructure more effectively. With Azure Virtual Network, users can define their own IP address ranges, create subnets, and configure routing and security settings. It supports various connectivity options, including VPN gateways and ExpressRoute, allowing seamless integration with on-premises networks. This flexibility makes it easier to build scalable and secure cloud solutions.