Act as an experienced SEO content writer with 5+ years of expertise in image optimization. Provide a detailed, step-by-step guide on how to optimize for Google's Image Pack, ensuring high visibility and engagement. Cover the following key areas: [IMAGE FILE NAMING BEST PRACTICES], [ALT TEXT OPTIMIZATION TECHNIQUES], and [STRUCTURED DATA MARKUP FOR IMAGES]. Include actionable tips, common pitfalls to avoid, and examples of successful implementations. Tailor the advice for [E-COMMERCE WEBSITES] and [BLOG CONTENT], highlighting differences in strategy. Use a clear, instructional tone and cite relevant Google guidelines where applicable.