Does anyone know what the labels on gogdb.org/changelog mean?
I can take a guess at some of them, "Build' is probably a galaxy update of the game. "Download" is probably the offline installer has been updated. But what are "Product" and "Property".
An explanation or a URL of an explanation would be appreciated.

You can see all details in extended changelog: https://www.gogdb.org/changelog-ext

Product: the item is a new entry in the catalog.
Property: one of the item's properties has changed, like the title, or whether it's in pre-order status. Apart from the aforementioned Extended Changelog, which is also linked at the top of the page you mentioned, you can simply click an entry that puzzles you to see the detailed change log.

Thanks for the answers, folks. I was hoping for some kind of legend because even if I figured it out in the morning, at my age, I'd have to re-figure it out after lunch. At least I can refer to this thread and it might jog my one memory brain cell.

Thanks for the link. I posted a query a week ago, but have not had a reply as of yet. Oh well.

If someone wishes to clarify this question here, I'd appreciate it.

My best guess is that "Property" is either some DLC or something like a soundtrack was added. Best guess for "Product is that an entry was made for that game, but probably no assets have been added, unless paired with another label.

Hey, I'm not entirely sure, but based on my understanding, "Product" on gogdb.org/changelog might refer to changes related to the game itself, possibly updates or modifications. Meanwhile, "Property" could pertain to alterations in the game's attributes or characteristics. It'd be great if someone could clarify these labels for a more accurate understanding