The Refers to the testing phase of software before it is officially released. During this phase, users can try out the softw… program is currently an invite-only feature to test out new versions of my plugins. You can send a message via the support form and ask for access.
Please make sure to select the A piece of software that adds specific features to WordPress. you want to get beta access to. I highly encourage you to test beta versions on a staging environment and not in production as they may have untested features and bugs.