More information about those 2 settings can be found in the Content Settings configuration documentation.
Additional improvements
Since the release candidate tracking has been added for Media items used via Macros in the Grid Layout editor and the Rich Text editor. These additional improvements were made by Marc Goodson for Umbraco 8, and are now included in the improvements in Umbraco 9.4 🙌
Furthermore, the “Relate on Copy” relation is now displayed on the Info app along with the other relation types.
Thanks, Dave 🙏
A big thanks goes out to Dave Woestenborghs who did a lot of the initial work of adding this out-of-the-box for Umbraco CMS. Dave has offered the functionality for Umbraco 7 and 8 via his popular Nexu package and kindly spent time on porting the initial functionality for Item Tracking to content items, as well as warning the editors when there is a risk of breaking items relations. It has been a big help in adding these fantastic features. Additionally, Dave submitted feature requests for adding this functionality to listviews as well as the configuration to disable delete and unpublish.
HIGH FIVE YOU ROCK 🙌
Content App support for Dictionary Items
Another interesting new feature is support for Content Apps on Dictionary Items. This allows developers to add new functionality related to Dictionary Items. This could for example be adding a translation tool to help out when adding new dictionary items or languages.