When you enable this feature, it will restrict the segment (i.e. the target audience) and the adapter (e.g. the sending domain or the from address in emails) that can be used in a campaign journey. This will thus eliminate human errors that result in messaging users from brands/ domains they haven’t subscribed to.
Such restrictions will be imposed via ‘restriction’ tags.
Restriction Tags: Once you enable this feature, you will notice a new setting called ‘purpose’ for tag folders. This setting allows you to define whether a tag folder can be used just for organization or for restriction (and organization). If you don’t specify the purpose of a tag folder, it will be treated as an organization tag.