Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
"Idiots 'r Us" is MS's big secret ... <grin>
The Product keys for all "big-ugly-stupid-yellow-plastic-CD-Box Retail" versions of Office software all allow 1 user, 2 pc installation. (Office Home and Student is the only exception. It allow 3 separate user concurrent installations.) This type of license also allows you to transfer installations to new computers.
The new "Product Key Card" allows installation on only 1 computer. Period! No transfer to new hardware. When the hardware dies (even same day as install), so does the Product Key Card license.
My personal recommendation is always to AVOID the PKC like the plague unless you are willing to gamble and lower price is an absolute over-riding concern. Too many people jump at the PKC discount, and then are dismayed when their hardware dies and is replaced under waranty, but they are stuck with having to buy a new Office License (hopefully they learned their lesson and go with a retail license this time).