Activity tab lists all the alerts. Here you will see for each alert, rule name, success or failure in sending the alert message, action chosen for the rule, matches found for the rule and the user who created the rule.
On the Activity tab, you can -
(1) Search for alerts using our search tokens
(2) Select a period to view the rules triggered during that time frame
(3) Click any bar to jump to the alerts triggered in a certain timeframe
(4) Use filters to view the alerts by rule name, action name, email recipients, and status
(5) Click the View Response under the Quick Actions menu, or click any of the rules to navigate to the view response page, where you can see all information about the rule status, including details such as Triggered on, Response Action, Impacted Assets, etc.