How to use the cache plugins for example the "yaml - YAML formatted files" plugin

How to use the cache plugins for example the “yaml - YAML formatted files” plugin

There is no documentation or exampleshttps://docs.ansible.com/ansible/2.5/plugins/cache/yaml.html

Start with the more generic docs for caching plugins, which can be found at https://docs.ansible.com/ansible/2.5/plugins/cache.html

The above link describes how to enable the plugins.