What is the purpose of unlinking clips in a split edit?

The purpose of unlinking clips in a split edit is to allow independent editing of video and audio. When clips are linked in a video editing environment, any adjustments made to one (for example, trimming or moving) will automatically affect the other. By unlinking, an editor gains the flexibility to manipulate the audio and video tracks separately. This is particularly beneficial in a split edit, where you may want the audio to start before the corresponding video, enabling a seamless transition or a specific timing effect, which can significantly enhance the storytelling aspect of a project. This control allows for more nuanced audio adjustments, such as layering sound effects or music without being confined to the timing of the visual elements.