Explain what the use of the 'tag' means in Ansible and what role it plays in task automation.

In Ansible, a tag is used to mark specific tasks or blocks in a playbook. This allows running only selected parts of the automation, ignoring the rest.

Purpose of tags:

• Enables selective execution of a playbook, for example, ansible-playbook playbook.yml --tags "install,configure" will only execute tasks with the tags "install" or "configure".
• Speeds up debugging and re-running specific steps without needing to run the entire playbook.
• Helps structure the playbook, making it more manageable and flexible.

Example of using a tag in a task:

- name: Install nginx
  apt:
    name: nginx
    state: present
  tags:
    - install

Thus, tags are a convenient mechanism for managing task execution in Ansible.