Service Mesh is becoming a key component in the Cloud Native world. It allows Dev and Ops teams to connect, secure, and observe applications without mixing business logic with infrastructure concerns. This way teams can focus on delivering value, letting the mesh do all the complex non-functional work like service discovery, load balancing, encryption, authentication, authorization, support for the circuit breaker pattern, and other capabilities. Istio is one of the major Open Source Service Mesh options available today.
In their talk, Paweł and Abdelfettah explained what Istio is, what problems it solves and how it plays nicely with GKE.
Here's the link to the recording.