When using normal Page Blueprints, any changes to the source blueprint will not affect pages previously made from that Blueprint. Sometimes, however, you want to be able to update a Blueprint and have that change propagate to all of the pages that reference the Live Blueprint. The Live Blueprint Macro allows you to do thisBecause Live Blueprints are not accessible in the Blueprint Menu, the Live Blueprint Macro is the only way to reference Live Blueprints. You can use multiple Live Blueprint Macros on a page, each with its own unique data if substitution fields were used in the Live Blueprint.