Best way to structure PMax asset groups for a bestsellers category?
I have a bestsellers category spanning multiple product types at different price points (e.g. chocolates, salsas, gift boxes). Currently running one big asset group with all bestsellers combined, and it's been performing well at 4x non branded ROAS.
Would it make sense to segment these into separate asset groups by product type to scale further, or is combining everything actually helping performance here? Not sure if splitting would just cannibalize what's already working, or if there is upside I'm leaving on the table.
Curious what's worked best for others, especially around scaling a strong performing asset group without disrupting it.