When creating an event in GEVME, you are presented with 2 options for the registration type of your event: Registration Form and Tickets.
Note that these options are offered in the Create New Event step only as a quick way to get you started with your registration. After that, you can still go in the backend and tweak the settings further.
Choosing the Registration Form option will result in a single, free registration form for one attendee to fill in. There will be a single Register button on your event page, which upon clicking, will bring the participant to the registration page:
Sidenote: In the GEVME jargon, what this is effectively doing is creating a single ticket called Registration, priced at $0. To learn more about tickets, check the article Understanding Tickets.
As mentioned earlier, these 2 proposed options when creating your event (i.e. Registration Form and Tickets) are only a quick way to get you started. Once you’ve created your event, more complex registration flows can be achieved by tweaking the various settings for Forms and (especially) for Tickets through the backend.
For more details on this, check the articles Understanding Tickets and Types of Registration Displays on the Event Page.