by Emma Richardson.
No, that is not how guest access works. There is a guest account already created in Moodle. It does not have a password. It allows you to let people into courses to look at them without actually enrolling. This is useful if you have a course just of resources that you want to make available to the world without having to mess with enrollments for example.
On the login page, there is a login as guest button. The only thing that will act different once someone is logged in as guest is that they will have access to courses that have Guest Access enabled in the course settings.