Act as an experienced SEO content strategist with 5+ years of expertise in educational content optimization. Create a detailed guide on best practices for optimizing quizzes for SEO, covering: 1) [KEYWORD RESEARCH STRATEGIES] for quiz topics, 2) [ON-PAGE OPTIMIZATION TECHNIQUES] including meta descriptions and header tags, and 3) [ENGAGEMENT BOOSTING METHODS] like interactive elements and shareability features. Include case studies of successful quiz-based content, analysis of ideal quiz length for dwell time, and schema markup implementation for rich snippets. Provide actionable steps for [BEGINNER/INTERMEDIATE/ADVANCED] SEO practitioners to implement immediately.