In this context (IIRC) smart means “if this zip contains a single folder with contents, directly extract that folder, but if the zip contains files and/or folders, extract all that to a new folder named the same as the zip file”.
Some people zip folders while some people zip the files in a folder. Smart extraction just handles both automatically.
I’m sure it does nothing, but every time DPD/other fucks up a delivery by failing to even ring the bell and says “we missed you”, I call up their customer service and waste their time complaining about the small amount of time allowed per package delivery.
I ask for drivers to be allowed more time. It’s not entirely their fault (but some seemingly have no situational awareness).