Tech evangelists have been with us since the beginning of the Macintosh operating system.

While the evangelist title is undeniably cool, when is it necessary for your company to deploy one and whom should it be?

We sat down with Dan Steinman, co-author of the book Customer Success: How Innovative Companies Are Reducing Churn and Growing Recurring Revenue and Chief Evangelist for Gainsight, a customer success company which helps businesses secure and surpass their customers' desired outcomes and deliver consistently amazing experiences.