Interaction Studio (IS) has a set of campaign reports that are valuable when looking at the impact of a campaign on a user's behavior. Details on the out of the box reports can be found in the documentation. At times though, you may want to send the engagement (impression, click, dismissal) events to Google Analytics where they can be analyzed next to campaign data from other channels. You may also then send the data from GA to Datorama, Google Data Studio, or other systems.