Using @ContentChild decorator enables access to projected content elements and components passed through ng-content for dynamic manipulation and interaction. As the creator of CoreUI, a widely used open-source UI library, I’ve implemented @ContentChild in countless Angular components for card headers, modal content, and flexible layout systems. From my expertise, the most effective approach is using @ContentChild with template reference variables to access projected content. This method provides direct control over content projection and enables advanced component composition patterns.