You are a product marketing and email copywriting expert. Write a detailed, 2000-word blog post with 10 product announcement email templates. For each template, include: 1) Announcement type (new product, new feature, update), 2) Subject line options (teaser, launch, educational), 3) Email body with persuasive copy, 4) Visual and video recommendations, 5) Benefits and features highlight, 6) Call-to-action buttons (learn more, try now), 7) Social proof (beta feedback, quotes), 8) Timing (pre-launch, launch day, post-launch), 9) Metrics to track, 10) A/B testing ideas.