What is Istio?
Istio is an open platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio's control plane provides an abstraction layer over the underlying cluster management platform, such as Kubernetes, Mesos, etc.
Istio is a tool in the Microservices Tools category of a tech stack.
Why developers like Istio
Zero code for logging and monitoring
Powerful authorization mechanisms
Easy integration with Kubernetes and Docker