Pop-ups are great for displaying important information or promos, but remember they are very obtrusive to users. Pop-ups are loaded immediately (when segmentation or URL match) on top of everything else.
Based on our experience, pop-ups should be used for the most important announcements that you don't want being overlooked by users. If you want to publish a regular changelog, check the Newsfeed announcement type. It is designed to serve news and changes.
Pop-ups are designed to be visible on top of other content. For example, if your user hasn't seen tours yet, they will be loaded in the background and the pop-up will be rendered over them.
If there should be multiple pop-ups visible on the same page (they all match the segmentation and URL filters), we group then into the carousel view as shown in the image.
Pop-ups are ordered from the newest to the oldest. That means the first visible popup is always the newest one and users can browse through older unread ones.
They can use the master close button (in the top right corner) to mark all announcements as read. It is important to note that while you will see all of these announcements as viewed in Insights, we cannot guarantee the user has viewed all of them.