This is the actual game or application data. It contains the graphics, audio, and code. You can download these via the "packages" section of the database.
To understand PSNDL, you need to understand the two-part system PlayStation uses for digital content: Https- Psndl.net Packages
PC gamers using the RPCS3 emulator use these packages to play their legal backups on a computer. This is the actual game or application data
PSNDL is a community-driven database that indexes links to PlayStation content hosted directly on Sony’s own servers. It serves as a searchable library for files and their corresponding RAP files (license keys). Https- Psndl.net Packages