For Adele, this song is about trying to reconnect with herself.
Adele says, “When I was 7, I wanted to be 8. When I was 8, I wanted to be 12. When I turned 12, I wanted to be 18. I always wanted to be older. I wanted to be shorter, too. I was 5’9”, but I wanted to be 5’7”. I always wanted to be someone else.”
Now Adele doesn’t want to be anyone else. She is happy with who she is, a mother and one of the most successful singers and songwriters in the world. In the song “Hello,” Adele is saying hello to Adele.