A pop shield helps prevent pops from getting in your recording. Pops are made when a microphone acquires fast bursts of air that are created as we speak plosives. Letters P, B, T or D are termed plosives mainly because they “explode” anytime they are spoken. Pop shields operate as a filter of these bursts of air to ensure the microphone doesn’t pick them up. A pop shield is clamped onto the microphone stand, not on the mic itself or else it might pick up noises as soon as the mic is moved.