What is the purpose of the sync lock button in a timeline?

The sync lock button serves the purpose of maintaining the timing of a group of clips when you are making edits in the timeline. By engaging the sync lock, you ensure that when you insert a new clip or make any adjustments, the relative positions of the locked clips remain unchanged. This is particularly useful in scenarios where the synchronization of audio and video must be preserved, or when you're working with multiple audio or video tracks that need to stay aligned throughout the editing process. It allows for seamless editing while protecting the timing of the clips involved, which can be crucial for maintaining the overall continuity and flow of a project.