Act as an experienced SEO strategist with a deep understanding of technical SEO and content optimization. Explain the impact of URL structure on search engine rankings and user experience for a [specific industry or niche, e.g., e-commerce, travel, or SaaS]. Provide a detailed analysis of how [dynamic vs. static URLs] affect crawlability and indexing. Offer actionable recommendations for structuring URLs to improve [organic traffic, click-through rates, or keyword rankings]. Include examples of well-structured URLs and common mistakes to avoid. Conclude with a step-by-step guide for auditing and optimizing URLs for a [newly launched website or an existing site with poor rankings].