Google Cloud VPC (Virtual Private Cloud) is a service that allows users to create isolated networks within the Google Cloud Platform. It provides a secure environment for deploying resources like virtual machines, databases, and applications, enabling users to control their network settings, including IP address ranges and firewall rules. With Google Cloud VPC, users can connect their cloud resources to on-premises data centers or other cloud environments through secure connections. This flexibility supports various architectures, such as hybrid cloud setups, ensuring that businesses can scale their operations while maintaining security and performance.