You get 100% of the audio data from the master file but at a smaller size than an uncompressed WAV.
Smoother high-end frequencies that reduce ear fatigue during long listening sessions. The "Pmedia" Updated Files: What’s New? metallica hires masters flac songs pmedia updated
Unlike WAV files, FLAC allows for robust tagging (album art, lyrics, year, and "updated" master notes). You get 100% of the audio data from