What does "closing open permits" entail?

[Jazmine S.]

I am looking at an appealing listing and it states that the buyer must close open permits. I see at least 6 that are not closed yet, but am curious as to what the negative impact of keeping them open would be. I understand the need to take care of a code violation immediately etc., but I always thought of a permit as being a permission granted to the homeowner for something specific they requested. Is there truly a need to close these out?