The project’s title is mainly used to help you keep track of your project. The title that appears in the generated file defaults to this, but it can be changed in the metadata.
Next choose the file format you want. This choice will affect the options on all subsequent steps, which is why it comes first (for example, the file format dictates what designs are available.)
Digital PDFs are intended for viewing on a computer, tablet or phone, but not necessarily for printing to paper. Usually includes working hyperlinks, ample colors, and other features that require a device.
Print-Ready PDFs are intended for printing on your home printer or with a printer service. Usually removes hyperlinks, avoids excessive ink use, and are designed for viewing the 2-page spread (using the front and back of a page).
Once you’ve mastered the basics, you can choose Both file formats. This is a bit more complicated because some designs may support different features. For your first try, it’s best to just choose one format.