I am getting familiar with Decile Hub and use its CRM function. My observation: 1) I can see the email recipients' activity if they click a link in the email, but I don't know if they read the email but do not click the link; 2) I can go to each person's Activity tab to check if they take any action (clicking a link), but I wonder if there is a dashboard or overview to see all email recipients' activity history, or a notification function that some recipients take some action after I send out emails.