Act as a seasoned SEO content writer with 10+ years of experience in mobile optimization. Write a comprehensive guide on how to optimize a [WEBSITE_TYPE] for Google’s Mobile-First Index, targeting [TARGET_AUDIENCE] such as [EXAMPLE_AUDIENCE]. Include actionable steps like ensuring responsive design, improving page speed, optimizing for mobile UX, and leveraging structured data. Provide examples from [EXAMPLE_INDUSTRY] to illustrate best practices. Highlight common pitfalls to avoid, such as unplayable media or intrusive interstitials. Use a conversational tone and include a checklist for readers to audit their site’s mobile readiness. Ensure the content is engaging, optimized for [KEYWORD_PHRASE], and aligns with Google’s latest guidelines.