What are seeders and factories in Laravel?

 Seeders populate application data. Factories define repeatable ways to generate model data, commonly for testing and development.

Factory example:
User::factory()->count(50)->create();

Seeder example:
public function run(): void
{
User::factory()->count(20)->create();
}

Scenario:
A developer can create thousands of realistic test users, products, and orders to evaluate pagination, indexes, Eloquent relationships, and performance before production deployment.