General Maintenance: Includes various "small issues" and bug fixes to improve overall stability.
For a block-building game, the story is surprisingly touching. Dragon Quest Builders 2 -NSP--US--Update 1.7.3-...
In the context of the file subject line (which suggests a file downloaded from the internet), this .nsp file is used to update a legitimate or backed-up copy of the game without downloading it through the official Nintendo eShop servers. Quick guide — Dragon Quest Builders 2 (US NSP) Update 1
: Fixed several minor bugs and "small issues" to improve overall game stability. Performance Key changes in Update 1