What is input lag?
The importance of a low input lag
The input lag of a TV is only important when playing video games. When gaming, there's a small delay between the controller and the action on the screen. This can negatively affect different types of games. Think of a racing game, during which you take a corner at the very last moment. If the game registers your action too late, you'll crash into the guardrail. With a shooter, you're at a disadvantage if the opponent sees you first and is quicker to react.