I am a fan of Spotify & their search engine and database is excellent. You can Spotify for free, but you will get ads. I pay for the premium membership and it is worth it. Spotify promotes all genres, but they do most heavily promote the current pop market & their various podcasts... that's where they get their $$$.
There are shortcomings in their product, and know that their algorithm will try to second guess you, so don't just go willy-nilly and listen out of curiosity, because you cannot delete what the Spotify algorithm serves up. You just have to ignore their offerings. I wish I could edit my listening history, but I can't. I suggest that you spend time on your browser as a free user to fully investigate Spotify and their capabilities.
Spotify is not user sensitive. Their cell phone app is better than their desktop app. I use both at different times. Lots of people complain about Spotify. I saw a post saying that Spotify has gone to the greed side. Yes, that's what I see too!
When you search on a specific artist, such as Miles Davis for example, you will get a full discography. You will find stuff you never knew existed. This is true for all genres. I wish there were a jazz forum equal to the quality of Talk Classical, but I haven't found one. Please speak up if you do!
Cheers.