• Simple playbook:

~~~

1. –
2. name: Install a package

hosts: web

    tasks:
      - name: Install nginx
        ansible.builtin.yum:
          name: nginx
          state: present
  ~~~

• Playbook with variables:

~~~

1. –
2. name: Install package with variable

hosts: web

    vars:
      package_name: nginx
    tasks:
      - name: Install nginx
        ansible.builtin.yum:
          name: "{{ package_name }}"
          state: present
  ~~~