Project signing is a new feature developed for Red Hat https://www.redhat.com/en/technologies/management/ansible that came out in the latest https://www.ansible.com/blog/whats-new-in-red-hat-ansible-automation-platform-2.3. It enables users to sign https://docs.ansible.com/automation-controller/latest/html/userguide/projects.html-based content (think playbooks, workflows, inventories, etc).
Project signing enables users to sign content and verify whether or not that content has remained secure.
Below is a simple project directory we will use to illustrate how to sign content using the ansible-sign utility.