Display Field Group based on a field value from another group.
Extend your Group Field conditional logic with extra set of rules and select field value as your condition.
– post object
A good use case is if you have multiple Field Groups displayed in the same location, but you’d like one of them to be visible only if the condition from the other group is satisfied.
It works well with ACF Custom Database Tables from Hookturn, where you might want to split one large Field Group into multiple smaller and have an organized DB.