1) The webinar introduces XfilesPro, an app that allows users to store, manage, and access documents in Salesforce by integrating with external storage systems. 2) Key challenges of document management in Salesforce include limited file storage, lack of seamless collaboration, and easy accessibility and visibility. 3) XfilesPro provides storage management, hassle-free file management, and easy file access through features like folder structures, centralized management, syncing, search, and access controls.