Can you tag a shopify product (similar to tagging on an order timeline)

I have always wondered why shopify does not have the ability to tag on the timeline of a product. Even if just allows one field. It would make life so much easier for us as we could easily make notes about what date we ordered stock from factory and the quantity ordered for staff to view.

We have been entering stock ordered as a purchase order but this does not work as stock isnt always made at the same time or will fit on one container. So we should only enter on purchase order when container is loaded.

It seems like such a simple concept. Just wondering its it possible?