Wiktionary
be all about
vb. 1 (context colloquial English) to deal with, to be focused on 2 (context colloquial English) to love, to enjoy, to be interested in
Usage examples of "be all about".
It was supposed to be all about how everyone else did things wrong, not about how he had killed the duck.
It'll be all about the kind of service he received, the level of devotion he was shown.