Submitting your songs for playlists that fit with the mood and style of that song is one of the best ways to increase streams and revenue from streaming platforms such as Spotify. I've come across many playlist curators and sites over the years, and here are a few of them.
These sites provide playlists for many genres, so have a look around first and see what playlists really fit with your song.
New Nordic Indie (Nordic Artists Only)
MusicVertising (both Free and Paid)
Levi, Stark Recordings