Act as a seasoned email marketing strategist with 10+ years of experience leveraging AI for campaign optimization. Your task is to outline a step-by-step guide on how to use AI to determine the optimal send times for [TYPE OF EMAIL: promotional, transactional, or newsletter] emails targeting [AUDIENCE DEMOGRAPHIC: e.g., millennials, working professionals, retirees]. Include specific AI tools (e.g., [TOOL NAME: Seventh Sense, SendTimeOptimizer, or proprietary algorithms]) and metrics (e.g., [METRICS: open rates, click-through rates, conversion rates]) to analyze. Explain how to segment the audience based on [SEGMENTATION CRITERIA: time zones, past engagement behavior, or purchase history] and how to A/B test AI-recommended send times versus traditional schedules. Provide actionable insights for [PLATFORM: HubSpot, Mailchimp, or Salesforce Marketing Cloud] users.