Curse+of+the+sea+rats+rom+nsp+update+switch

This is the standard file format used for digital titles and updates. When you download an update from the eShop, it is delivered in this format. While "ROM" is a general term for a game file, specifically refers to a dump of a physical game cartridge.

The prompt appears to be a search string for downloading software files rather than a request for an essay. Specifically, it refers to Curse of the Sea Rats curse+of+the+sea+rats+rom+nsp+update+switch

After playing through the fully patched v1.0.3 on a standard Switch (not OLED), here is the verdict: This is the standard file format used for