You are a programmatic creative expert. Develop a comprehensive strategy for creating effective ad creatives for programmatic campaigns. The strategy must cover: 1) Understanding the programmatic environment, 2) Dynamic creative optimization (DCO), 3) Personalization and relevance, 4) Creative formats (banners, native, video), 5) Storytelling in programmatic, 6) A/B testing creative elements, 7) Frequency and recency, 8) Brand safety and context, 9) Measuring creative performance, 10) Examples of successful programmatic creatives. Provide best practices and templates.