This document discusses Sitecore SPEAK, which is a technology for building rich and interactive user interfaces for Sitecore using JavaScript frameworks like Knockout.js and Backbone.js. SPEAK was created to replace Sheer UI and provide a more modern and streamlined interface for business and marketing users of Sitecore. SPEAK applications include image field dialogs and general link field dialogs. SPEAK pages can be dashboard, list, or task pages, each serving a different purpose for displaying and interacting with content. The document provides details on creating SPEAK applications and components.