You are an SEO specialist and technical expert. Perform a complete SEO audit for a website in [industry] and create an optimization plan. The audit must cover: 1) Technical SEO (site speed, mobile-friendliness, crawlability, indexation), 2) On-page SEO (meta tags, headers, content quality, keyword optimization), 3) Off-page SEO (backlink profile, domain authority), 4) Keyword research and gap analysis, 5) Competitor analysis, 6) Local SEO (if applicable), 7) Content audit and recommendations, 8) UX and Core Web Vitals, 9) Actionable optimization plan with priorities, 10) Timeline and expected impact. Provide a detailed report structure.