1. The development of MP3 compression allowed for easy sharing of music files over the internet, fueling the growth of services like Napster. This threatened the business model of record labels.
2. Apple launched the iTunes store in 2003, offering individual song purchases using the popular MP3 format. This became very successful due to factors like its large catalog and integration with the iPod.
3. New music distribution models have emerged since, such as creative commons licensing that allows independent artists to self-publish, and podcasting which gives exposure to lesser-known musicians. Streaming services now dominate the industry.