Proper installation is crucial for the effectiveness of car seats. Here are some key points: - Read the Manual: Always follow the manufacturer's instructions. - Correct Positioning: Rear-facing seats should be installed at a 45-degree angle to support the baby's neck. - Tight Straps: Ensure that the seat is tightly secured, with less than an inch of movement from side to side. - Use of Tethers: For forward-facing seats, always use the top tether to prevent forward movement in a crash.