It just means that you need to write down how your journey with music has made you feel and what it means to you. For the wider social group part it means that have you met new people or connected with other people by liking the same kind of music. And then take that and connect it to your favorite musician or song.
I am a musician, and honestly, I love music. I play the piano and the flute and I sing. At school I am in my own little group of musicians, we are our own musician nerd group:)