Data Collections are a set of a Data Items. If you are used to traditional SQL databases you might look at Data Collections as a Table containing rows of data (specifically, Data Items).

Data collections are central in working with data in your app as this is where you store and load your data items to your app.

Collections may be added to any page and could be configured to be persistent (stored in the database) or temporary (temporarily stored in the memory). You may also configure a collection to be private (only accessible from the page where it was added) or global (accessible from all parts of your app).

A collection may only contain one type of data items (Data Items with the same model).

Read more about how to add data collections to your page here and read more about the Visual Coding managers to modify data here.