Image flicker is when each frame is only displayed for a short time, with black frames inserted between. Flickering the image displayed on a TV influences how clear movement appears to be when tracked across the screen.| RTINGS.com
If you watch content with fast-moving objects, like in video games, sports, or action movies, it's important to get a TV with a good response time and minimal blur.| RTINGS.com
Input lag is the amount of time it takes for your TV to display a signal on the screen from when the source sends it. It's especially important for playing reaction-based video games.| RTINGS.com