One of Odoo's most powerful features is the ability to add features without directly modifying the underlying objects.

This is achieved through inheritance mechanisms, functioning as modification layers on top of existing objects. These modifications can happen at all levels: models, views, and business logic. Instead of directly modifying an existing module, we create a new module to add the intended modifications.

Here, you will learn how to write your own extension modules, empowering you to leverage existing core or community applications. As a relevant example, you will learn how to add Odoo's social and messaging features to your own modules.