Conversion Rate Optimization (CRO) Checklist

Run until you reach: (1) 95% statistical significance AND (2) at least 1,000 conversions per variant AND (3) minimum 2 weeks of runtime to account for day-of-week variation. Tools like VWO or Google Optimize show significance in real-time. Never stop a test just because one variant looks better in the first few days — early leads often disappear with more data.

A heatmap is a visual overlay on your webpage showing where users click, move their mouse, and how far they scroll — displayed as color gradients (red = high activity, blue = low activity). Types: Click maps (where users click, including non-clickable elements — these are frustrated clicks indicating users expect links that are not there), Scroll maps (how far down the page users scroll — reveals whether your CTA is above the fold for most users), Move maps (mouse movement, correlated with eye movement). Tools: Hotjar (free plan available, most popular) or Microsoft Clarity (completely free). Install on: homepage, top landing pages, and checkout/form pages. Review after collecting 1,000+ sessions per page. Key insight: if your primary CTA is below where 60% of users stop scrolling, move it up.

Session recordings are videos of real user interactions with your site — every mouse movement, click, scroll, and form interaction captured. How to use them for CRO: (1) Filter for sessions that ended without conversion on high-traffic pages, (2) Watch at 2x speed, pause when users show signs of confusion (repeated clicks, scrolling up and down, long pauses before form fields), (3) Note specific friction points: confusing UI, form errors, unclear CTAs, trust concerns, (4) Look for rage clicks (rapid repeated clicking on an element) — these signal strong frustration, (5) Review sessions where users abandoned the checkout or form — identify exactly which field or step caused them to leave. After watching 20 sessions per page, patterns emerge. These qualitative insights lead to hypotheses for A/B tests.

Ranked by average conversion lift across studies: (1) Rewrite headline to be specific and benefit-focused — average 10–40% lift, (2) Reduce form fields to minimum required — average 10–30% lift per removed field, (3) Add/improve social proof (specific testimonials with results, star ratings) — average 15–30% lift, (4) Improve CTA button copy (specific vs generic: "Get My Free Audit" vs "Submit") — average 10–20% lift, (5) Add live chat or WhatsApp for real-time questions — average 20–40% lift for high-consideration purchases. What does not move the needle as much: font changes, minor color changes (unless current CTA has very low contrast), reordering page sections. Focus your testing roadmap on the five high-impact items first before micro-optimizations.

Essential CRO stack: Analytics: Google Analytics 4 (free, essential for funnel analysis and conversion data). Behavior analytics: Hotjar or Microsoft Clarity (both have free plans) for heatmaps, scroll maps, and session recordings. A/B testing: VWO or Optimizely for paid options (best features), or Google Optimize was discontinued in 2023 — alternatives include Convert.com or AB Tasty. User research: UsabilityHub (5-second tests, preference tests), UserTesting.com for moderated sessions. Voice of customer: survey tools (Typeform, SurveyMonkey) for on-site exit surveys. Minimum viable CRO stack for small businesses: GA4 + Hotjar free plan — gives you 80% of the insight at zero cost. Add a paid A/B testing tool only when you have 10,000+ monthly visitors to reach statistical significance in a reasonable timeframe.