A/B testing or split testing is a process that compares variations of web page designs to see which performs better with the target audience. It can test things like images, calls to action, structure, videos and headlines on landing pages. A/B testing helps make informed marketing decisions and get the most out of web traffic. Benefits include low bounce rates, reduced risk, high conversion, more sales and revenue, easy analysis and elimination of guesswork. Common mistakes to avoid are running tests too long, testing too many elements at once, using low traffic, not tracking external factors, and not measuring the entire customer funnel. A successful A/B testing campaign involves having a clear test plan, defining time spans, KPIs