1) Micronaut is a JVM-based framework for building microservices and serverless applications that offers features like reactive HTTP server/client, automatic service discovery/load balancing, and support for technologies like AWS, GCP, and GraalVM. 2) Micronaut aims to address limitations of frameworks like Spring for microservices by using ahead-of-time compilation instead of reflection at runtime for improved performance. 3) The presentation demonstrated how to quickly generate and run a basic Micronaut application in Java, Groovy, or Kotlin along with a live demo of a book inventory application built as interoperable microservices using Micronaut and Consul.