The Alexa app, not Alexa feature, on a Fire or iPhone/iPad gives you visual feedback much like the Apple Music app where you can see album art, control playback, change volume, browse the lists of played songs, etc. You also get control over books, shopping, timers, alarms, skills, smart home thingies, settings, etc. All of this you can do by telling Alexa to do them with your Echo, Dot, Tap, or you can opt to use the Alexa app on another device to control the Echo, Dot, Taps, etc. The attached screenshots are showing me what song is playing on my Echo. I mostly use the app for seeing what is playing and for quickly changing settings.

Again, that was the Alexa app. I do not have a Fire tablet capable of installing the Alexa feature.