Here’s How Apple Music’s “For You” Suggests Music For You

Apple treats "likes" or “hearts” in Apple Music is a way of tailoring the "For You" recommendations in the service, along with the help of things like personal library data. Tapping or clicking a heart button when playing content in Apple Music in fact only affects the For You section of the service, and will not skew the content of the service's built in radio stations. The For You section is also influenced by additions to a listener's personal library, and any time a track is listened to in full.