Final answer:
Puppet is the configuration management tool that stores configurations in modules written in Ruby DSL, facilitating the management of system configurations efficiently.
Step-by-step explanation:
The configuration management tool Puppet stores its configurations in modules written in a Ruby Domain-Specific Language (DSL). Puppet's modules are collections of manifests, templates, files and other resources that allow you to manage a particular aspect of a node's configuration in an organized manner.
Given this ability these modules play an essential role in the management of system configurations using Puppet which is a widely recognized infrastructure-as-code tool.