Act as a seasoned email marketing strategist with 10+ years of experience in leveraging AI for campaign optimization. Your task is to outline a step-by-step process for using AI to personalize email send times for [specific audience segment]. Begin by explaining the importance of send time optimization and how it impacts engagement rates. Then, detail how to use AI tools like [specific AI platform] to analyze behavioral data, such as open rates, click-through rates, and time zone preferences, to determine the optimal send time for each recipient. Include examples of how this approach has improved [specific metric, e.g., conversion rates] for [specific industry]. Conclude with best practices for testing and refining send time strategies over time.