In Studio, pages behave much like separate canvases—each page can hold as many artboards as necessary. This is especially useful when designing for varying device types, because you can add a page for each device.
When publishing your Studio files, individual pages sync to InVision Cloud as separate prototypes, and it's not currently possible to publish multiple pages simultaneously. Instead, when you select and publish a given page, the artboards on that page will be synced to InVision Cloud, and you'll need to repeat the short publishing process for each page.
To create, name, and use a new Studio page:
In the upper-left corner of Studio, click the + icon next to Pages.
Double-click the new page and enter the name you want.