Moodle auto-login guests

Normally public Moodle sites are public in the sense that you have to login as GUEST, with no password or registration required. You just click on the LOGIN AS GUEST button and get into the site.

But the setting below allows you to automatically treat visitors as GUESTS, with no LOGIN AS GUEST button.

The setting is called ‘auto-login guests’ and is located under:
Administration > Users > Permissions > User Policies

The description for the ‘auto-login guests’ setting is:
Should visitors be logged in as guests automatically when entering courses with guest access?

This appears to be a global setting, and needs to be changed by the Administrator.

Thanks to Jose Hales-Garcia for finding this answer.