A collection is a way to organize your OnePagers. You can create any number of collections and a collection can contain any number of OnePagers.
The collection controls the Sub Domain for each OnePager inside of it. This is used for creating a pretty URL that is easy to type, for example:
The collection also has two banner options that by default will be visible on all OnePagers inside of that collection. This includes the Collection Banner includes a Logo and Text that you can edit.
A collection can also include a Promo bar.
The collection banner and promo bar are shown on all pages inside of the collection by default.