Gapless playback is the uninterrupted playback of consecutive audio tracks, such that relative time distances in the original audio source are preserved over track boundaries on playback. For this to be useful, other artifacts (than timing-related ones) at track boundaries should not be severed either.

What is gapless playback on Spotify?

Gapless playback is the uninterrupted playback of consecutive audio tracks without intervening silence or clicks where the song changes. It's pretty common on a lot of albums and it's now enabled by default in Spotify on the desktop: ... Crossfading was another often-requested feature that logically fits in with gapless.

What do you mean by gapless playback?

Gapless playback lets the tracks flow seamlessly, one to the next, without any silence between. Perfect for classical music, live recordings and concept albums. It's such a useful feature that the new release of Spotify will have gapless 'On' by default.