In Spotify, it's quite simply a music-streaming library. It's in an online repository, so you need an internet connection to access it. It features streaming radio stations, as well as millions of songs by many thousands of artists. If you heard this one song one time 10 years ago are many chances that are you'll be able to find it on Spotify. Also, Spotify promotion has many advantages and is very useful for new musicians. In recent years there appeared some services of boosting the Spotify accounts (
https://spotistar.com/buy-spotify-plays/ ), and many artists have created and change their business from Itunes to Spotify