Puppet is an open source configuration management and automation tool that helps system administrators automate repetitive tasks, such as configuration management, application deployment, and software updates. It is used to manage the configuration of systems, including the operating system, applications, and services.
For example, Puppet can be used to deploy a web server and configure it for a specific application. Puppet can also be used to ensure that all systems in an organization are running the same version of an application, or to ensure that all systems are running the latest security patches.