Act as an experienced SEO specialist with 5+ years in digital marketing. Write a detailed guide on how to optimize images for SEO, covering best practices such as file naming, alt text, compression, and responsive design. Include [FILE_FORMAT] recommendations (e.g., JPEG vs. PNG), [TOOLS] for compression (e.g., TinyPNG, Squoosh), and [SCHEMA_MARKUP] tips for rich snippets. Ensure the guide is actionable, with examples and a checklist for readers to follow. Target beginners but include advanced insights for professionals.