It sounds like you’re asking for a description or explanatory text about a VAG dump tool—a device or software used to read out data (a "dump") from electronic control units (ECUs) in Volkswagen Auto Group (VAG) vehicles (Audi, VW, Skoda, Seat, etc.).
Older but reliable tools for reading pin codes and adjusting instrument clusters. VCP (VAG CAN Professional): vag dump tool
VAG dump tools are specialized interfaces that bypass standard OBD-II security layers to obtain raw binary images of ECU memory. It sounds like you’re asking for a description