Rancher is an exciting new technology that makes it easier for developers to manage their containerized applications. With Rancher, developers can easily manage their containerized applications and clusters in a centralized way, and quickly deploy, upgrade, and scale them. Rancher also supports a wide range of container orchestration tools and cloud providers, so developers can quickly find the best solution for their needs. Plus, Rancher has a great user interface that makes it simple for developers to manage their applications and clusters. In short, Rancher is a great tool for developers who want to quickly deploy, upgrade, and scale their containerized applications.