A car platform is the underlying structure that supports a vehicle's body and components. It includes the chassis, suspension, and drivetrain, serving as the foundation for various models. Manufacturers often use the same platform for multiple vehicles, allowing for cost savings and efficient production. Using a shared platform, automakers like Volkswagen and Toyota can create different models with similar features while maintaining unique designs. This approach helps streamline development and manufacturing processes, making it easier to introduce new vehicles to the market while ensuring quality and performance across the lineup.