This guide will walk you through how to turn email notifications on and off. If you want to adjust in-app notifications then check out this guide: https://help.pinpoint.support/en/articles/3197387-what-notifications-are-provided-in-pinpoint
Whilst in Pinpoint, in the upper right of the screen click your profile icon, then click 'Settings':
Next click the 'Notifications' tab:
Next, simply tick or untick the email notifications as desired. When finished click 'Update'.