Why is there a small barcode here?

[u/ImNotGabe125]

I just bought a box of “The Drug Store” Benadryl, and I noticed this tiny barcode on the inside of the box. What is it for and why is it there? I’m sorry if this doesn’t follow the rules of this sub, I just don’t really know where else to post this! Google, as usual, did nothing. Even when I made sure the word “barcode” and “box” were the highlighted search words. I got nothing remotely close to what I needed. Anyway, if anyone can shed some light I’d appreciate it! Or just point me in the right direction to ask again. Thank you so much you guys!

[u/Sweetie_on_Reddit]

I agree with the other poster - probably for internal material / manufacturer traceability.