Using what mechanism in Ansible can you split runs and not execute some tasks during a regular run?

In Ansible, the mechanism of tags is used to separate runs and exclude certain tasks during a normal execution. Tags allow marking tasks, blocks, or roles, and then running the playbook specifying which tags to execute or skip.

For example, if you have tasks with tags setup, deploy, and cleanup, you can run only deploy during a normal execution:

ansible-playbook site.yml --tags deploy

Or, conversely, exclude tasks with the cleanup tag:

ansible-playbook site.yml --skip-tags cleanup

This is convenient for separating heavy or rarely needed operations from the standard deployment process.

Example in a playbook:

- name: Install packages
  apt:
    name: nginx
    state: present
  tags:
    - setup

- name: Deploy application
  copy:
    src: app/
    dest: /var/www/app/
  tags:
    - deploy

- name: Clean temporary files
  file:
    path: /tmp/app_cache
    state: absent
  tags:
    - cleanup

Thus, tags can be used to flexibly manage task execution.