This document provides instructions for installing and configuring the Maintenance Mode extension for Magento 2. It allows merchants to create a customized "coming soon" or maintenance page for their site rather than using Magento's default page. The document outlines how to install the extension via command line or manually, and how to configure settings like redirect pages, maintenance end times, design elements, and more from the Magento admin panel. It also provides screenshots of examples of the backend extension settings and frontend maintenance page.