The document provides installation steps for EC-CUBE 3.0.X. It outlines the system requirements including supported web servers, PHP versions and extensions, and database servers. It then details the installation flow including setting up the server configuration, placing files and folders, and performing the initial setup either via the web interface or command line. The initial setup via the web interface involves 6 steps to complete the configuration, while the command line method involves running scripts from the command line.