About AVS Notifications | Alexa Voice Service

Alexa can guide the user to a card in the Amazon Alexa app, where the user can enable notifications for the active Alexa skill or domain. A user can enable or disable notifications for an Alexa skill or domain at any time through the Alexa app. Navigate to Settings > Account > Notifications and toggle notifications ON or OFF.

https://developer.amazon.com/en-US/docs/alexa/alexa-voice-service/notifications-overview.html