E-commerce Conversion Checklist: 24 Wins We Ship on Every Project

Above the fold

1. One primary CTA per page, contrasted against everything else
2. Hero copy answers "what is this" in under 8 words
3. Trust signal in the hero viewport (reviews, customer count, partner logos)

Product pages

1. First image loads under 1s
2. Price visible above the fold on mobile
3. Add-to-cart sticky on scroll for mobile
4. Reviews summary above the description
5. Shipping cost calculated before checkout

Cart

1. Persistent cart icon with item count
2. Auto-apply discount codes when valid
3. Cross-sell, not upsell (related items, not bigger versions)
4. Free-shipping progress bar when close to threshold

Checkout

1. Guest checkout enabled by default
2. One-page checkout for under 3 fields total
3. Auto-detect card type from number
4. Order summary visible throughout
5. Pay-later options (Klarna, Afterpay)

Post-purchase

1. Transactional email under 30s
2. Order tracking link in confirmation
3. Asking for review at delivery, not purchase

Technical

1. LCP under 2.5s on 3G
2. INP under 200ms
3. HTTPS, HSTS, modern TLS
4. Sitemap submitted to GSC and Bing

Ship all 24. Measure before/after. The compound effect is usually 30–60% conversion lift.