When creating a project from the application menu, you can choose to use a template or default settings as a starting point for the project.
To create a project using a template
Revit provides several project templates, which reside in the Templates folder in the following location:
The software creates a new project, using the selected template as a starting point.
To create a project using default settings (no template)
The software creates a new project, using default settings as a starting point.