You can set up email alerts to be notified when someone has made changes to your content. Please note that the email alerts can only be set up on the user level.
In the Alerts section under Content & SEO, click Add Alert. Then you will be able to set up alerts based on your preference in terms of Marketplace (Country) and Frequency. Once the alert is set up, you may also customize it by Product Tag Grouping.
For complete guide, visit The Complete Guide to Content & SEO.