What is the main benefit of using clappers at the beginning of a shot?

Using clappers at the beginning of a shot provides the primary benefit of helping to synchronize audio and video during the editing process. When the clapper is closed, it creates a visual cue—the sharp movement of the clappersticks—and an audio cue—the distinct clap sound. This combination makes it easier for editors to align the separate audio tracks with the video footage. This synchronization is essential for ensuring that dialogue and actions appear in sync, which enhances the overall cohesiveness of the project.

While clappers may assist indirectly with other aspects, such as providing a reference point for notes or potentially assisting with sound quality in some cases, their main purpose is to facilitate the syncing of audio and visual elements effectively.