Ansible provides the capability to divide content logically into separate files. This capability helps project developers to not repeat the same code over and over again. Roles within Ansible take this capability a step further and wrap some magic around the paths to the content. Roles are tunable, reusable, portable, and shareable blocks of functionality. Ansible Galaxy exists as a community hub for developers to find, rate, and share roles. The ansible-galaxy command-line tool provides a method of interacting with the Ansible Galaxy site or other role-sharing mechanisms. These capabilities and tools help with the organization and utilization of common code.

In the next chapter, we'll cover different deployment and upgrade strategies and the Ansible features useful for each strategy.