Service Mesh with Consul refers to using HashiCorp Consul to manage and secure communication between microservices in a distributed system. It provides service discovery, traffic management, and secure service-to-service communication without requiring changes to application code. Consul uses a control plane and integrates with sidecar proxies to handle routing, load balancing, and observability. It also supports features like service segmentation, health checking, and encrypted communication using mutual TLS. This helps improve reliability, scalability, and security in cloud-native applications. Service Mesh with Consul is widely used in microservices architectures, Kubernetes environments, and modern enterprise applications.