star-wars-tiny-death-star
I keep building these imperial levels and delivering supply workers to build items that show in my inventory screen (rebel secrets! security codes!) but I can't figure out why I would want to do that.
What do the imperial items do for me other than pile up in my inventory menu item?
In short, stock piling helps with the imperial quests going forward. When you complete a quest, the next one may ask for an item that you have already stocked. So, in general, you will likely get paid back for those items you paid credits to generate. That said, you will do better in the long run building floors that generate credits as a means to make credits. And, if you are diverting too many credits to your inventory you will make less money over time.
In answer to the other portion of your question, many of the lesser items will re-appear in later quests, just in large quantities.
The Imperial items are not for sale like those of the levels above.
They are for completing Imperial quests that Darth Vader assigns if you tap on the level below the Arrivals floor. This is the level with his hologram on it.
When you tap there, he will assign you to build a series of items in exchange for a bonus in credits. These bonuses can quickly add up, some of the higher ones reach >200,000 credits.
Best Answer
These items are used to complete Imperial Assignments.
You can tap on the floor below your Arrivals floor (It is not named in the game, but some tips early-on explain its use) to see - and complete - the current assignment. These assignments require an increasing amount and variety of Imperial Items.