✅ "What is the fragrance?" ✅ "What does it smell like?" ✅ "What is the scent?" ✅ "What fragrance is this?" ❌ "What the fragrance scent?" (Incorrect) ❌ "What the fragrance flavor?" (Incorrect—"flavor" is for taste, not smell.) ❌ "What the fragrance scent is?" (Incorrect word order)

If asking for the brand name and product name of a perfume or incense product, you could ask: What perfume is that / what kind of incense is that? It smells really good. I want to get some of that for myself. If more interested in the ingredients, you could ask: What kind of fragrance/scent is that, do you know? Does it come from a flower of some sort? What kind of flower is that I'm smelling?