Backing vocals are additional vocal parts that support the main singer in a song. They enhance the overall sound and add depth to the music. Backing vocals can include harmonies, call-and-response sections, or simple repeated phrases, and they are often performed by other singers or the main artist themselves. In many genres, such as pop, rock, and R&B, backing vocals play a crucial role in creating a fuller sound. They can help emphasize certain lyrics or melodies, making the song more engaging. Producers often layer these vocals in the recording process to achieve a rich auditory experience.