notifications to review content

Does anyone know of a way where we can either set up AEM or use external software to help us do the following

A way to document when a page's content has been last changed (beyond just a typo fix). Perhaps the author could leave notes in a log what they changed.

Send reminders to certain people we define at defined intervals telling them to review the content on a page. This would help us ensure it is still accurate and compliant.

thanks