When creating your Custom Dashboards, you might want to take a look at your engagement score over time. To add this component, go to Insights > New Dashboard or select a previously created Custom Dashboard > Add Component > Engagement History. For more info on creating Custom Dashboards check out this help desk article!
The Engagement History component displays your organizational engagement score, open rate, and click-thru rate over time. Click the reporting period in the top-right corner of the card to select a timeframe!