Act as an experienced SEO specialist with 5+ years in optimizing visual content for search engines. Craft a detailed guide on how to optimize images for Google's Image Search, covering best practices such as [FILE NAMING CONVENTIONS], [ALT TEXT STRATEGIES], and [IMAGE COMPRESSION TECHNIQUES]. Explain the importance of [RELEVANT KEYWORDS] in filenames and alt attributes, the role of [IMAGE SITEMAPS], and how [RESPONSIVE DESIGN] impacts visibility. Include actionable tips for [MOBILE-FRIENDLY OPTIMIZATION] and [STRUCTURED DATA MARKUP] for richer snippets. Provide examples of before-and-after optimization scenarios to illustrate key points. Keep the tone professional yet accessible, targeting website owners and content creators looking to improve their image search rankings.