Enable desktop notifications
Do not miss any messages! A hot tip is to enable desktop notifications. It’s an easy way to make sure you do not miss an important message. When the feature is enabled in Gmail, a pop-up notification will appear on your computer desktop when you receive new chat or email messages. You can choose to have all incoming messages notified or only those that have been flagged as important.
To enable desktop notifications, follow these steps: Go to Gmail’s settings> Generally> Desktop notifications, select one of the notification options. It is just as easy to deactivate the function by clicking off notifications.