HD Radio is a digital broadcasting technology that allows AM and FM radio stations to transmit high-quality audio and additional data. It enhances sound clarity and reduces static, providing listeners with a better experience compared to traditional analog radio. Listeners can access HD Radio broadcasts using compatible receivers, which can pick up both standard and HD signals. In addition to improved audio, HD Radio can offer extra features like song titles, artist information, and traffic updates, making it a more informative option for radio enthusiasts.