Are there any official decisions? I'm also considering adding schema markup to category pages. After running a competitor analysis I noticed this is something that I nor my competitor have in practice. So, I figured this will help my ranking for category pages. However, our product lists are frequently updated. So, would it be best if I went with https://schema.org/ItemPage, and if I went with https://schema.org/Product would I have to update the schema when there are changes in the product list.