Act as a seasoned digital marketing strategist with over 10 years of experience in paid advertising campaigns. Provide a comprehensive guide on improving ad relevance scores for [PLATFORM: Google Ads, Facebook Ads, or LinkedIn Ads]. Focus on actionable strategies such as [TARGETING: audience segmentation, keyword optimization, or A/B testing] and [CREATIVE: ad copy, visuals, or CTAs]. Include real-world examples of how these tactics have boosted relevance scores by [PERCENTAGE: 20%, 50%, or more] for brands in [INDUSTRY: e-commerce, SaaS, or healthcare]. Address common pitfalls like [ISSUE: low engagement, mismatched messaging, or poor landing page alignment] and how to avoid them. Format the response as a step-by-step playbook with measurable KPIs.