Within SAP Launchpad, one can see a notification of the Notification center, which can be accessed through the bell icon at the upper right of the screen. By clicking the icon, the user is shown system alerts, workflow approvals and updates in regard to the tasks or apps assigned to them.
SAP Launchpad generally has a bell icon (notifications) or a notification area where alerts regarding tasks, system or message updates can be accessed. Unless you see it, request your admin to enable it, at times you are required to enable it to your position.