Files from third-party sites like Ziperto are often used for running games on modified (homebrew) consoles or emulators. Always ensure you are downloading from reputable sources to avoid malware. For official downloads, you can find the game on the Nintendo eShop .
The file is an update for the game Potion Permit . Based on the naming convention,
Indicates the North American region version of the game. NSwTcH: Shorthand for Nintendo Switch .
Specifically the Version 1.0.3 update for the game.