What is the difference between "number of Runs" & "User Engagement"?

Summary:

When Looking at the OGL Dashboard, you can extract information for Number of Runs and User Engagement..

I am trying to understand the difference with these two fields.

Here is the definition(s) provided on the Dashboard:

Guide Runs - The number of times any guide has been engaged during the reporting period. A single guide engaged multiple times will count multiple times in this number.

Guides Engaged - This refers to the number of guides the user has interacted with within the past chosen interval.  A guide with which a user has engaged during the defined period. The definition of "engagement" varies for different Guide types. Number of engaged guides during the time period.