If it's like my inspections went, they'll mostly just note if you have small paperwork errors, and instruct you on things to double-check. Which really you should be doing anyway.
I guess their notes go into their report, and in future inspections, they might move up to citing you if the errors persist, which could eventually result in a fine or penalty or loss of license.
Mostly they want to see that your A&D book matches your physical inventory, and anything that was disposed of has the proper outgoing paperwork. If you have any Title 2 inventory, they'll probably start there, then move on to the Title 1 stuff (which they won't already have a list of).
Missing inventory or grossly errant paperwork might result in more severe actions, but I never had those issues.