The YouTube music users can now read the lyrics while taking note of a song on the service's iOS and Android apps. It is a music streaming application from YouTube. To look at the lyrics in it, once you've got opened a song within the app, tap the "i" button on the left side of the screen. The lyrics will show under the tracking bar of the song.
Apple Music and Spotify can also show lyrics when you play a song, and in some songs, those services can push the lyrics in real time while playing the song. Now, all lines of YouTube music are consistent, so if you want to follow along with the track you have to manually scroll down.
It seems that not every song has lyrics. YouTube tells The Verge that they get updated lyrics from LyricFind on a daily basis, but does not share a timeline for how long it takes for the source lyrics of specific songs.
The lyrics are no longer supported in YouTube Music's web player, but YouTube says the feature is active. Through YouTube Music you can browse through music videos on YouTube based category.