Apparently extra or empty packing:
Why are some things that don’t seem delicate packed in bubbles or paper? Why are partly or completely empty boxes some filled with paper or bubbles? The packers 1st priority is to get everything delivered without damage. To maximize the use of space, sometimes packers need to create filler or buffer packages to support the load and protect more delicate items. The higher quality the packer, the more apparently wasted space there is.