"Is Spotify recording all of my conversations?

No. Spotify will begin receiving your voice input data when you press the action button or say the wake word or (for voice ads) when you hear an audible tone, and continue until Spotify has processed your question or request.

The device will always indicate to you when Spotify is receiving your voice input, for example with a visual indicator or an audible tone.

When listening for the wake-word, Spotify listens in short snippets of a few seconds which are deleted if the wake-word is not detected."