Proper installation of a car seat is critical for its effectiveness. Follow these steps: 1. Read the Manual: Always read both the car seat and vehicle manufacturer's instructions. 2. Positioning: Place the car seat in the back seat of your vehicle. 3. Angle: Ensure the car seat is at the correct angle to prevent the baby's head from flopping forward. 4. Secure: Use either the seat belt or the LATCH system to secure the car seat firmly. 5. Check: Make sure the car seat does not move more than an inch side-to-side or front-to-back.