A creative is made up of different page types and pages. Depending on the format that you select while developing a creative, the Pages tab displays the page types. For example, when you select the Banner format, the Pages tab will display only Banner type in Pages tab. Whereas, if you select Expandable format, then the Pages tab will display both Banner and Expandable format as shown in the following image.
Important: Multiple page types in the Pages tab can be connected with actions from the Events tab.
The Pages tab allows you to add and delete as many pages as you want. Not only you can add a new page, it also lets you add duplicate pages. Doing so, will create an exact copy of the workspace with all the elements and properties to simplify your life.