What does marking 'in' and 'out' signify in video editing?

Marking 'in' and 'out' in video editing is essential for selecting specific portions of a video clip that you want to include in your project. The 'in' marker indicates the start point of the clip, while the 'out' marker defines the end point. This process helps editors to isolate and work with only the required segments, facilitating more efficient editing and refining of the final product. By clearly marking the beginning and end of a clip, editors can control the narrative pace and ensure that only the most relevant footage is included.

The other options do not accurately capture the purpose of marking 'in' and 'out.' Choosing music tracks, tagging for social media, or editing metadata pertains to different tasks in the video production process and does not relate to the precise action of defining clip boundaries within the editing timeline.