The Notification Service is designed to improve performance. It allows simultaneous tasks to be queued, and then executed in order. There is no longer a need to wait for a supported task to complete before starting another.
The status of these tasks can be seen by clicking the bell notif-bell=83daca58-5def-4997-8928-433788010eb9.png notification icon at the top of the console.

Tasks supported by the Notification Service

Trend Cloud One - Endpoint & Workload Security

Alerts
Events & Reports
Computers
Dismiss Alert
Export Events
Export Computers
Generate Reports (Single Report)
Send Policy
For more information, see Asynchronous Tasks.