These are cards you can print out to make a variety of common loot easily available for tabletop play without needing to roll. The items themselves are meant to be pedestrian, mundane, and mostly not worth much (in some cases an item is entirely worthless). The cards aim to emulate ordinary-ish goods that might be found in a wide variety of scenarios.
There are four types of cards, with five, six, seven and eight items respectively. The types are named Corpse, Case, Crate, and Cabinet, to give an indication of the setting imagined and to increment the potential value of the
junk treasure. The loot is parser generated so the types primarily vary by quantity, though an attempt has been made to tweak the types of items as well. Clearly you should not feel confined by these arbitrary titles; while a Corpse card might make sense for the treasure from a dead goblin, a bandit gang that has recently robbed a merchant might warrant three Cabinet cards.