Write a detailed guide on how to optimize images for SEO, covering best practices such as [FILE FORMAT SELECTION], [ALT TEXT IMPLEMENTATION], and [COMPRESSION TECHNIQUES]. Explain why each step matters for search rankings and user experience. Include examples of tools like [TOOL NAME] for compression and [PLATFORM NAME] for testing image load speed. Ensure the content is actionable, with step-by-step instructions, and avoid fluff. Target audience: [BLOGGERS/WEBSITE OWNERS/E-COMMERCE MANAGERS] looking to improve their site performance.