Cloudsmith is a platform that allows developers to create, manage and distribute software packages, including RPMs, in a private or public repository. Cloudsmith supports various package formats, including RPMs, and provides features such as versioning, dependency management, and access controls. The platform also offers a user-friendly interface for managing repositories, tracking dependencies, and deploying packages. By using a private Cloudsmith repository, developers can maintain control over their software packages and ensure consistent builds across different environments.