YouTube expects the moves to boost ad revenue it generates from music on the platform, which includes over 70 million official tracks plus remixes, live performances, covers and other music content. And it stands to put YouTube in more head-to-head competition with Spotify, which has been selling audio-only ads and offering targeting by music genres for years.
Source: YouTube Launches Audio Ads and Ad-Targetable Music Lineups, Taking Aim at Spotify