The response of a list API method represents a single page in a reverse chronological stream of objects. If you do not specify the page, you will receive the first page of this stream, containing the newest objects.
The stream of objects will return 40 objects for the requested resource by default and an object containing meta-information about the list. here is an example of the meta object:
The current page of the resource list.
The next page number if any, otherwise null
The previous page number if any, otherwise null
The total number of pages for the list of resources
The total number of invoices in the list