Creating a new presentation is one of the most basic commands you'll need in Google Slides. You can create a new, blank presentation, or create a new presentation based on a variety of pre-designed templates.
Using a template allows you to begin with a presentation that has already been designed and formatted so you can just insert the information. This saves you time and you will end up with a professionally designed presentation.
The Template gallery appears, with tabs that sort templates into two groups. The first tab is for templates you, or others in your organization, have submitted. The second tab is for built-in templates.