If you submitted your release encoded in 24-bit certain DSPs represent this higher resolution audio differently compared to standard 16-bit audio. This badging conveys to users that they can enjoy your music at an even higher fidelity than 16-bit; given they have the appropriate sound system/speakers or headphones required to produce a discernible difference compared to the standard 16-bit version.

Apple

High-Res Lossless

When you supply 24-bit audio with sample rates of 88.2, 96, 176.4, or 192 kHz for all tracks Apple will badge your release as "High-Res Lossless".

Tidal

Max

When you supply 24-bit audio for all tracks Tidal will badge your release as "Max".

Amazon

Ultra HD

When you supply 24-bit audio for all tracks Amazon will badge your release as "Ultra HD".

Users signed into an Amazon Music Unlimited account can tap on the Ultra HD badge to view the track specs while the track is playing.