.NSP is the standard file format for Nintendo Switch digital games and updates. The .rar extension indicates the file is compressed and must be extracted before use.
This indicates the NSP file is compressed in a RAR archive to reduce download size. You will need software like WinRAR or 7-Zip to extract it. Platform: Nintendo Switch. Update 1.0.5 Features & Fixes MotoGP-24-Update-1.0.5.NSP.rar
The short answer:
Refinements to the Adaptive Difficulty system, which tailors the game's challenge based on your performance. MotoGP-24-Update-1.0.5.NSP.rar