Gmail notifications may not appear on Android devices due to disabled app notifications, incorrect sync settings, aggressive battery optimization, or restricted background data usage. If notifications are turned off within the Gmail app or system settings, emails will not trigger alerts even when received. Additionally, Android’s power-saving features can limit background activity, preventing Gmail from syncing in real time. Poor internet connectivity or outdated app versions can also disrupt notification delivery. Resolving the issue typically involves enabling notifications in both Gmail and system settings, disabling battery restrictions for the app, ensuring sync is active for the correct account, and maintaining stable internet access.

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