First-Party Data Collection Overview Third-party cookies are deprecated across all major browsers, and iOS tracking restrictions have cut paid signal quality by 30–60%. First-party data — information customers actively share with you — is now your most defensible marketing asset. This skill covers collecting preference data through quizzes, surveys, and preference centers, then using that data to personalize email, SMS, and product recommendations. Klaviyo and dedicated quiz apps make this achievable without custom development for most stores. When to Use This Skill - When ROAS on Meta and Go…