Symfony 3 is a web framework that allows developers to create dynamic web applications. The Symfony 3 project described in the article can be set up with basic user handling capabilities, including user registration, login, and profile editing, using the Friends of Symfony User bundle. To begin, a new Symfony 3 project needs to be created, and the installation process should be completed, which includes setting up the database and enabling the mailer_user parameter. The fos_user config file must also be updated to specify the location of the User class and other necessary settings. After installing the FOS User bundle, additional configuration is required, including updating the security.yml file and creating a new User entity in the src/AppBundle/Entity directory. Finally, the database schema needs to be updated using the doctrine:schema:update command. The article provides a step-by-step guide on how to set up this basic user handling system with Symfony 3.