• Researchers have created a user engagement metric that is more detailed than Dwell Time and other standard measures of user engagement.
  • In 2014 they published a research paper titled, Towards Better Measurement of Attention and Satisfaction in Mobile Search that explored using a mobile browser viewport to track user behavior in order to improve user engagement.
  • Obviously, Viewport Time is a valuable user engagement metric.

    Source: https://www.searchenginejournal.com/viewport-time/228761/