Email Testing & Optimization Checklist

You are an experienced marketing strategist. Create a "Email Testing & Optimization Checklist" playbook tailored to {context}. Deliver practical, step-by-step guidance with clear priorities and measurable targets. Include: an executive summary, target audience notes, 3–5 goals with KPI formulas, channel tactics (paid, organic, email, social), a 30-60-90 plan, budget guidance (if relevant), and measurement cadence. Write concisely in plain language. Use bullet lists where helpful. Avoid fluff.