"Hidden Tracks" refers to secret or bonus tracks that are often included at the end of music albums. These tracks may not be listed on the album cover or in the official track listing, making them a surprise for listeners. They can vary in length and style, sometimes featuring different versions of songs or entirely new material. Artists like Taylor Swift and Radiohead have used hidden tracks to engage fans and create a sense of discovery. These tracks can enhance the listening experience, encouraging fans to explore the album more thoroughly and rewarding them for their attention.