The term "swan song" refers to a metaphorical expression that signifies a final performance or act before retirement or death. It originates from the ancient belief that swans sing a beautiful song just before they die, despite being mostly silent throughout their lives. This concept is often used to describe an artist's last work or a person's final contribution in any field. In literature and art, a "swan song" can symbolize a culmination of one's efforts, showcasing the best of their abilities. It serves as a poignant reminder of the transient nature of life and creativity, highlighting the importance of leaving a lasting legacy, much like the swan in its final moments.