There are multiple ways to receive notifications from Teachme Biz. The method of notification varies depending on the content of the notification.
Notifications are sent to the email address registered in your account. The sender address and recipient vary depending on the notification content.
Related: Teachme Biz: Types and recipients of emails
https://help.teachme.jp/hc/en-us/articles/12065353441049
Mobile App "Updates"
Various notifications are delivered in the "Updates" section of the mobile app.

Related: Check updates (mobile app)
https://teachme.jp/8/manuals/42273519
Mobile App Push Notifications
Push notifications are delivered to your mobile device in the form of banners or pop-ups. Tapping a push notification opens the related screen in the mobile app.
If there are unread push notifications, a notification dot (badge) is displayed on the app icon.
To receive push notifications, you need to turn on notifications from Teachme Biz in your device settings.
Related: Turn on push notifications
iOS: https://teachme.jp/8/manuals/40007136
Android: https://teachme.jp/8/manuals/40016516