Reverbs come in many shapes and sizes, but a good rule of thumb is to use shorter reverbs like rooms and plates for more upbeat songs, and longer reverbs like halls for slower ballads. Most reverbs and delays can be synced to the tempo of the track, allowing you to dial in just the right amount of decay. Try setting the decay time so the effect fades away just before the next phrase begins.
You’re probably well aware of SoundCloud by now, but its widget feature is worth mentioning. Because SoundCloud is completely free and typically reliable, it’s the perfect place to host music over your site. Yes, you’ll lose some royalty money by not linking up to your Spotify or Apple Music account, but going with SoundCloud is the best option because it doesn’t force those visiting your site to sign up with yet another service. Plus, it’s essentially social media for track releases.