Which metric is considered crucial for evaluating engagement during walkthroughs?

The engagement metric is pivotal for assessing how users interact with walkthroughs. This metric provides insights into the user's level of participation with the content and can reveal patterns such as how many steps they completed, how frequently they return to the walkthrough, and overall interaction levels. High engagement indicates that users are finding the content valuable and are actively participating, which is essential for determining the effectiveness of the walkthrough.

Other options, while they provide valuable insights into user behavior, do not specifically reflect interactive engagement during the walkthroughs. User retention rate speaks to how many users return over time but does not quantify immediate interaction quality. Time spent on site could indicate interest but does not directly measure engagement within the walkthrough itself. Visitor demographics can inform about the types of users but do not measure interaction or engagement level. Thus, the engagement metric stands out as the most relevant for evaluating how well the walkthroughs resonate with users.