The document discusses building cloud-native applications with OpenStack. It covers what the cloud and cloud-native mean, key cloud-native design patterns like stateless services and microservices architecture, and how OpenStack and Platform9 can serve as integration engines to deploy and manage cloud-native applications at scale according to these patterns. The main takeaways are that the cloud is about agility and innovation, virtualization alone does not equal cloud, workloads need the right architecture, and cloud-native patterns like stateless services should be followed.