You might be. ;)
This lets you assign a specific ID to all events within the page-view. A page-view starts when a page is loaded in a browser, and ends when the user navigates away or reloads the page. (If they later return to the same page a new page-view commences.)
So the identifier here is associated with a view of the page, not with the page itself. Normally this is auto-generated but this mechanism lets the server control the identifier when serving up the page to a client.
Hope this helps,
- Andrew