In this chapter, we learned about the basic Odoo structure for modules. Files must be named in exactly the way the Odoo framework expects, and you must follow this structure for your module to properly load into Odoo. We explored how to extend Odoo with additional fields and display them on forms. Next, we extended our custom module with a workflow example. This allowed us to see how we can peek into existing Odoo modules to assist us with developing our own module.