Page History

This tab The SQL Server Object type tab of the Edit Event Alert Rule wizard allows you to change the type of SQL Server object that should be monitored by this alert rule. You can generate alerts for objects on currently audited databases and SQL Server instances.

...

By default, the alert rule will generate alerts for matching events on all audited SQL Server instances.

You can specify one or more objects:

...

The rule details pane also allows you to change your specified alert rule criteria at any time as you edit your alert rule. As you specify criteria using the Edit Event Alert Rule wizard, the rule details grows to include these additional settings. To edit previously set criteria, click the corresponding setting.