Many media streaming apps like Spotify provide a like button so that you can tell the app you like what you hear. The app then tries to curate playback based on the feedback you give it.
I enjoy the ability to enhance music playback in this way, as it helps with artist discovery. But it frustrates me that you need to physically be in the Spotify app to like a song, which calls for a multitasking and gesture shenanigans even when you’re trying to get something done in another app.