A music streaming service is a platform that allows users to listen to a vast library of songs and albums over the internet. Instead of purchasing individual tracks or CDs, users can access a wide range of music for a monthly subscription fee or for free with ads. Popular services include Spotify, Apple Music, and Amazon Music. These services often offer features like personalized playlists, radio stations, and the ability to create and share playlists with friends. Users can access music on various devices, including smartphones, tablets, and computers, making it easy to enjoy music anytime and anywhere.