Notion AI
Notion says it does not use Customer Data, including user content under personal terms, or permit others to use it to train the machine-learning models used to provide Notion AI.
Notion AI customer data is stated not to be used for model training, except where users voluntarily provide feedback or permission for improvement.
No opt-out is required for the stated baseline; improvement can occur when users voluntarily provide feedback or permission.
Notion defines AI input and output as Customer Data in its supplementary AI terms.
The cited terms focus on training rights rather than one short retention explanation.
The cited terms do not provide one general human-review disclosure.
Foundational reference pages for teams adopting, deploying, and operating production AI with inspectable controls.