You can change the notification settings of your profile as follows:
Click the user icon in the header.
Select "My user profile".
You will now see the e-mail and push notifications options. You can enable or disable these across the board as you wish by simply clicking the toggle button.
In the detailed notification settings, you can set in which cases you want to be notified via which channel.
Tip: You can activate/deactivate notifications for entire modules or have yourself notified only in very specific cases by unfolding the module lines.