By using a solution from Gong.io, Diligent is able identify opportunies for growth on which a sales rep can be coached. This case is therefore classified as a Sales Coach that helps with Coaching and Training. It helps Diligent to grow their Sales (by improved coaching).
The Arthur D. Little website contains a section with "Insights on Marketing and Sales", which is a Content Marketing portal that contains three types of articles: 1) Publication Prisms, 2) Reports and 3) Viewpoints