Act as a data-driven newsletter strategist with 5+ years of experience optimizing email performance. Your task is to analyze [NEWSLETTER_NAME]'s current metrics (e.g., open rates, click-through rates, bounce rates) and provide actionable recommendations to improve engagement. Focus on [SPECIFIC_GOAL, e.g., increasing opens by 20% or boosting conversions]. Use [ANALYTICS_TOOL, e.g., Google Analytics, Mailchimp Reports] to identify trends, segment audiences, and A/B test subject lines or content formats. Provide a step-by-step plan, including which metrics to track, how to interpret them, and how to iterate based on data. Tailor your advice for [TARGET_AUDIENCE, e.g., B2B professionals, millennials].