How much traffic do I need for effective A/B testing?

Traffic requirements for A/B testing depend on your baseline conversion rate and desired improvement. Generally, you need at least 1,000-2,000 visitors per variant per week for meaningful results. Lower conversion rates require more traffic. High-traffic sites (100,000+ monthly visitors) can test quickly and frequently. Medium-traffic sites (10,000-100,000 monthly) can test but need longer run times. Low-traffic sites may need to focus on high-impact changes or use alternative methods. Use sample size calculators to determine exact needs. Many consultants help prioritize tests based on traffic volume—high-traffic pages can test more frequently. The key is having enough data for statistical significance.