A commonly used file format for audio files is MP3. MP3 (MPEG Audio Layer III) compresses audio data while retaining sound quality, making it ideal for music distribution and streaming. This format provides a balance between file size and audio fidelity, significantly reducing storage space. MP3 files are widely supported across different devices and platforms, from smartphones to computers and online streaming services. The popularity of MP3 has impacted how audio content is shared and consumed, contributing to the digital music revolution.