Redundant by Green Day is a song reflecting on the monotony and repetitive nature of relationships. The key themes include routine, feelings of being trapped, and the desire for change and renewal. The lyrics highlight the struggle of maintaining excitement and true connection in the midst of redundancy. Green Day uses poignant imagery and reflective tone to convey the bittersweet reality of relationships that have lost their initial spark. This song resonates with anyone who has experienced the mundanity that can sometimes accompany long-term commitments.