Why is Factory definitions important in Laravel applications, and what problem does it solve for developers?

Why is Factory definitions important in Laravel applications, and what problem does it solve for developers? The key reason to understand factory definitions is that Laravel applications are usually composed of several layers that must work together predictably. Factories define how fake model attributes should be generated. Ignoring that boundary can lead to duplicated logic, poor security, unnecessary database work, or code that is difficult to test. Why it matters in practice: Seeders provide intentional data-loading workflows while model factories generate realistic model records for development and testing. The specific focus here is factory definitions: Factories define how fake model attributes should be generated. This question is designed to test not only terminology, but also how the concept fits into Laravel's request, application, database, security, or deployment workflow.