This is fairly anecdotal, but... The Ansible Galaxy is a repository of code/libraries that people have written and published to be consumed by others. I've _never_ been able to use anything I've found on the Ansible Galaxy in my environment because everything I've looked at has been so opinionated or inflexible it would be less work to write something that does the same job from scratch.

This is in stark contrast with my experience with the Puppet Forge, which my environment uses 20+ modules from for managing different parts of our systems.