How does A/B testing optimize marketing campaigns, and what are the key steps to conducting an effective A/B test?

A/B testing optimizes marketing campaigns by comparing two versions (A and B) to determine which performs better based on defined metrics. Key steps include identifying the objective, selecting the variable to test (e.g., email subject line), creating variants, splitting the audience randomly, running the test for a statistically significant period, and analyzing results. Effective A/B testing helps refine marketing strategies, improve conversion rates, and enhance user engagement.