Explain what fake migrations are in Django and in what cases they are used.

In Django, fake migrations are migrations that are marked as applied without actually changing the database. This is useful when:

• You have synchronized the database manually or with another tool, and want Django to "believe" that the migration has already been applied.
• When migrating a project with an existing database to avoid reapplying migrations.

Command to create a fake migration:

python manage.py migrate --fake <app_name> <migration_name>

This tells Django that the migration has been applied, but it will not alter the database structure.