For computer users on the online application: Go to Settings on the left menu, then click on Contact Methods. Here you can update your email, phone, and other contact information, including managing notifications for your contact methods.
To update your notifications, watch the video below or check out How To Manage Notifications - Web version.
For mobile devices users: Go to More on the bottom menu, then click on Settings. Under Contact Methods you can update your email and phone. Under Manage Notifications you can decide what notifications you receive.
To update your notifications, watch the video below or check out How to Manage Notifications - Mobile version.