They ask each other questions in the song: Jackson’s “Is there somethin’ else you’re searchin’ for?” shows an understanding of her passion for music and Ally’s “Aren’t you tired tryin’ to fill that void?” detailing her grasp of the beginning of his career spiral.
What’s beautiful about the song and the sequences pertaining to “Shallow” is how it represents a mutual respect and interest Jackson and Ally have for one another.