What the preview is useful for
The most common use is confirmation. When a catalog contains six entries called the same thing, hearing four seconds of audio settles which recording matches the ISRC in front of you far faster than comparing durations.
It is also handy for reference listening while you research. Checking the mix loudness, the intro length or the arrangement of comparable releases does not require a full stream, and the preview loads instantly.
What you can and cannot do with it
These clips are hosted by the streaming platform and remain the rights holder's property. They are fine for identification and private reference. They are not licensed for use in your own content, in a release, in a video or in any commercial context, and links are time limited by the host, so they are not a download library.
If you need audio you can actually use, license it properly or use your own masters.
What the result shows
An inline player for the preview clip, the direct audio link, plus the ISRC, label, release date, duration and tempo of the recording so you can identify it precisely.
Results come from Deezer's public catalog and Apple's public album data, so anything commercially released and distributed to streaming should be found. Unreleased tracks, private uploads and releases that never reached streaming will not appear.