Many older tutorials suggest using the effect under "Obsolete" effects. While it works, it often creates a "blotchy" look and isn't GPU-accelerated, making your render times painfully slow. VR De-Noise is a much faster, modern alternative that keeps your playback smoother while you edit.
The VR De-noise effect is "spatial," meaning it blurs each frame individually. In contrast, professional plugins are "temporal," meaning they look at multiple frames to distinguish moving grain from static detail. vr denoise premiere download