I need to call a 3rd part service in coordination with an Activity.  I am looking at DataProviders.  How to tell Target (at.js)  which mbox depends on the data provider? That is, if I have 3 mbox, regional not global, on a particular web page and I need only one of these mbox to depend on the data p...

I'm a bit new to Target and trying to build some guideline docs.  Can anyone point me to a 'best practice' on when to choose a regional mbox over global mbox?