Write an Ansible playbook to display the message Hello World
Here's an example Ansible playbook that will display the message Hello World on the target host:

---
- name: Display Hello World message
  hosts: all
  tasks:
    - name: Print Hello World
      debug:
        msg: Hello World

This playbook consists of one play that runs on all hosts, and one task that displays the message Hello World using the debug module.

To run this playbook, save it in a file with a .yml extension (e.g., hello_world.yml) and then run the following command: 
ansible-playbook hello_world.yml

This will execute the playbook and display the message Hello World on the target host.
What does the .yml file extension represent?