Metal has always been a goto for me, when I'm feeling sad, tired, happy, energetic or just normal.
A lot of songs have been written to include an important message, sometimes it's hidden, other times its not.
It can be historical (panzerkampf - sabaton),
it can be strong (raining blood - slayer),
even melodical (pinball Map - In flames).
It can tell stories too (twilight of the thunder god - amon amarath)
Even old-school (Kickstart my heart - Mötley Crüe). And who doesn't love a good old fashion death metal song? (clouds over California - DevilDriver)
But it always allows people to experience music in sometimes a unique way.