A clipboard is a temporary memory area on the server that is associated with every connected Pega 7 Platform requestor, including browser-based users and unauthenticated guest users. The clipboard has a hierarchical structure, consisting of nodes known as pages, most of which have a name and an associated class.
In simple words, the clipboard is kind of a cache memory
If you select clipboard page, you are telling PRPC the information you need is temporary and is storage in the clipboard. Most of the time, a data page creates a clipboard page.
How to access the clipboard? In the designer studio toolbar, the one which is as the bottom (Kind of the taskbar) you will see some advance features and there you have the clipboard icon. I recommend you to review all those features since they are pretty useful.
Thanks Bryan for the detailed explanation of Clipboard.
My actual concern was that from where we were getting only 3 clipboard pages. After some exploration, I found that these might be related to the properties of SAE-HRServices-Work properties which gets populated as pages in clipboard when a case is run.
In the exercises you created several Properties of the type Page or Page-List. Page simply means object. So the pages you see in the clipboard relate back to the properties you created as the type Page or Page-List. For example, the object that holds the data in memory that represents Employee. Employee was the Property of the type Page under SAE-HRServices-Work which is a place holder for the class SAE-HRServices-Data-Employee.