This is a sandbox project, which contains experimental code for developer use only.
The Reading Time module adds a field that can be added to any content type that contains a body field. The Reading Time field calculates the estimated reading time for the content contained in the node's body field and displays it. You have likely seen this functionality on sites like Medium.
Including an estimated reading time provides a better user experience for sites that make use of longform writing, as people visiting your site will have a more objective idea of how long it will take them to read the page's content. This should result in an improvement in user retention on your site.
See Brian Cray's post about reading time for a discussion of the benefits of displaying reading time to your site visitors.