Google Ads Brings Campaign Change History to Its Reporting
https://support.google.comHistorically, it wasn’t easy to review your change history report and reporting data in order to understand changes in your campaign performance. To help you understand the impact of your campaign changes, you can now view changes annotated in your performance charts.
For example, let’s say you notice a drop in conversions for one of your active campaigns. With the change history report, you can now hover over the markers in the performance chart to get more details about the changes you’ve made over a defined period.