You use the administration section of Sitefinity to manage your website. Sitefinity has user-friendly tools for setting workflows, user management, site synchronization, changing backend and frontend languages, and more. There are also basic and advanced settings sections where all settings, relevant to your website, are accessible through the UI.
Using the administration section you can control the access to your website. Sitefinity has granular permissions, which make you very flexible in granting users or roles specific permissions for different parts of the system. Using the workflows you can design and control the lifecycle of your pages and content items.