The document discusses dynamic widgets in CMS building. Dynamic widgets allow efficient customization of websites by integrating with Odoo apps like allowing users to subscribe to discussion groups or create leads from a contact form. The document outlines how to create a contact widget with a contact form that can create leads from submitted questions by defining the widget content, adding it to the CMS editor, allowing dynamic configuration of sales teams, and linking it to backend controllers and routes to interface with Odoo apps.