1. Above the fold and hero: The first 5 seconds. If the headline does not name the outcome and the CTA is not visible without scrolling, you are losing 30 to 50 percent of visitors immediately.
2. Value proposition and messaging: The 'why you, why now, why this' question. If your copy could be lifted onto a competitor's site without changing a word, your value prop is broken.
3. Calls to action and buttons: CTA copy, hierarchy, color, and placement. The most common mistake is having 4 equal-weight CTAs above the fold and zero clear primary action.
4. Forms and lead capture: Field count, field order, error states, and microcopy. Every field after the third drops completion by 4 to 8 percent.
5. Trust, proof, and social signals: Logos, testimonials, case studies, security badges, and review snippets. B2B sites without proof above the fold convert 40 percent worse than sites with it.
6. Page speed and Core Web Vitals: LCP, INP, CLS, TTFB. A 1 second delay in LCP costs roughly 7 percent of conversions on mobile.
7. Mobile experience and accessibility: Tap targets, readable text, scroll friction, and assistive tech support. Over 60 percent of B2B research traffic is now mobile.
8. Navigation, IA, and user flow: Whether the site funnels or scatters. Sites with more than 7 nav items in the header convert worse than sites with 4 to 5.