I was having a discussion with someone on reddit and they were trying to explain to me that ontological properties are not descriptive, they are just "tags". When I said I understood a property to be descriptive, for example a red apple has the property of being red, they said this:

"You're describing an ontology over language, and yes that would be correct for languages. But you cannot then extrapolate that out to the physical world and say that we have described apples as red because "red" in the real world isn't a simple property that you can talk about in ontological terms."

I've never studied philosophy and I feel there is a disconnect between common language that the terms they are using.

Could anyone explain this to me?