Discuss the concept of 'implicit animations' versus 'explicit animations' in Flutter.

In Flutter, implicit animations are automatically handled by the framework, requiring minimal code to achieve common UI changes like opacity or position transitions. On the other hand, explicit animations involve manual specification of animation changes using AnimationController or AnimationBuilder, providing more control and flexibility. While implicit animations are convenient for simple cases, explicit animations are preferred for complex and custom animations where precise control over the animation's behavior is necessary. Understanding when to use each approach is vital for effective Flutter development.