Puppet is a continuous configuration automation tool that automates the configuration of entire infrastructures, managing thousands of servers or devices with ease. The two main components of Puppet are the server and the agent. The server stores configurations and defines which nodes will be applied to, using modules and manifests written in a ruby-like syntax. The agent pulls configurations from the server and applies them to nodes to bring them into the desired state. Puppet can manage various operating systems including Linux, MacOS, and Windows. It's ideal for automating the configuration of a private Cloudsmith repository and installing required packages and dependencies. A worked example demonstrates how to set up a Cloudsmith repository using Puppet, creating a module to configure the repository and install a package. The example uses the apt module to define the configuration of the repository and installs a Debian package from the Cloudsmith repository.