TL;DR. Great PDPs optimize three things: (1) speed (LCP < 1.8s, INP < 200ms), (2) clarity (gallery, variant, buy button), and (3) trust (reviews, return policy, shipping, social proof). Each element has measurable conversion impact. Stack them deliberately.
The PDP funnel
Typical ecommerce funnel (industry benchmarks 2025–2026):
| Step | Median conversion | Top-quartile |
|---|---|---|
| PDP view → add-to-cart | 8–15% | 20–30% |
| Add-to-cart → checkout | 50–65% | 70–80% |
| Checkout → purchase | 50–70% | 75–90% |
| Overall PDP view → purchase | 2–4% | 8–15% |
Stores that move from median to top-quartile on each step double or triple revenue per session.