Translations:J4.x:File Structure and Naming Conventions/22/en
From Joomla! Documentation
This file holds the model class {ModelName}. This class must extend the base class \Joomla\CMS\MVC\Model\BaseDatabaseModel. Note that the view named {ViewName} will by default load a model called {ViewName} if it exists. Most models are named after the view they are intended to be used with, but this is not a requirement. See Using multiple models in an MVC component for more information.