Act as a seasoned digital marketing strategist with 5+ years of experience in Asian markets. Craft a detailed guide on leveraging LINE—Asia's dominant messaging app—to boost blog engagement. Cover [content types that resonate], [optimal posting schedules for peak activity], and [interactive features like polls/stickers]. Address cultural nuances for [Japan], [Thailand], and [Taiwan], emphasizing localized humor, trends, and etiquette. Include metrics to track (e.g., open rates, sticker replies) and pitfalls to avoid (e.g., overly salesy tones). Format as a 10-step checklist with emoji highlights for readability.