Glad you asked, because I asked myself that and thought a bit about it before doing it.
So I'll tell you this: Nothing and everything. I put MMM up when we were opining on the Millennial turnout in 2020, kicking around ideas about them.
'Nothing,' for more reasons than I can think of, but a few are...
-- music is personal
-- music gives left brain relief; also lowers elevated hormones during all the left brain activity here;
-- music promotes heart and right brain emotional flow, even if the music is bouncy
-- the audience here is not predominantly millennial, from what I've gathered (I could be wrong), but what the hell... it's for anyone, really
'Everything,' for more reasons, some personal and/or political, some not ...
-- my son is a Millennial DJ who weekly streams live, three-hour music shows, and posts music everyday, so I pass only a bit of that along to anyone -- boomers, gen-x'ers, millennials -- here who might like it. He got most of his exposure to music and politics from me, anyway, though he's taken off in new directions I enjoy being exposed to. So there's that.
-- my father was a jazz drummer; my daughter was the first white singer to be accepted into the U of Illionois (Champaign) Gospel Choir; she was a front singer in three bands in Chicago over nine years(Metro, House of Blues, etc) ; my husband and son play piano; my grandson plays drums and has performed at Chicago's Metro
-- I know Millennials who like 95% of what I like, which includes old American rock days along with today's bleeding edge stuff; and I like 95% of music that Millennials like. I know a lot of Millennials because I raised one, taught, and generally hung out with Millennials for 35 years. Still do.
-- I want Millennials in the Democratic Party, to like DU ...
It's just an outreach gesture, is all.
It's just my wanting to share with anyone here, really.