'Field' refers to an abstract class that represents a column in the database table.
The Field class is just a subclass of RegisterLookupMixin. In Django, these fields are used to create database tables (db_types()) which are used to map Python types to the database using get_prep_value() and the other way round using from_db_value() method. Therefore, fields are fundamental pieces in different Django APIs such as models and querysets.
