So you’ll need to add some degree of sharpening or detail enhancement to the Adobe Denoise image if you’re hoping to match the level of detail those products tend to produce by default. It does add some detail, but not real sharpening like DXO or Topaz DeNoise do. Adobe Denoise is designed to reduce noise.
Expect to make some minor changes to adapt your approach if you’re already using another noise reduction tool. That’s not something you should do often, but it can be useful in some cases. You may apply manual noise reduction in addition to Denoise. You may wish to -click to select the original as well so that you may blend the two. Click “Enhance” then you may open the new image which shows in the film strip. Click the preview to view before/after to help choose the desired amount of Denoise. You may alternatively click the – icon (or -click in the preview) to zoom out, then click elsewhere in the preview to zoom back in. You cannot change the size of the preview, but you can easily pick other parts of the image to preview by clicking directly on the image. If you -click Denoise, it will run “headless” and immediately process the image with the same settings used last time you ran denoise. In the Detail tab, click the “ Denoise” button. 
Consider using exposure or shadow adjustments so you can clearly see any noisy areas you’ll want to review in the next steps (this won’t affect the results and you can change/undo it later).
You may also -click to select multiple images at the same time.
Open or select an image in LR or directly in ACR (the feature is not available in inside RAW Smart Objects and the RAW Filter does not actually work with RAW data). The final result is significantly less luminance noise, less color noise, and better preservation of detail compared to the older manual noise removal. And it can even reduce hot pixel noise in some images. It can help make larger prints from images captured at an optimal ISO. It’s is extremely helpful for noise in shadows, high ISO images, and small sensors (such as images captured with a drone). In my experience, this tool consistently adds a lot of value for its intended targets: noisy images. In this tutorial, you’ll learn why you should use it, how to get optimal results, and how it compares to DXO PureRAW. There are now a number of AI-based tools and ACR is already among the best in its first release. Noise reduction is a powerful tool not only for high ISO images, but also noisy images from small sensors (such as drones) or helping to make larger prints from low ISO images. Adobe Camera RAW (ACR v15.3) and Lightroom (Classic v12.3 / Desktop v6.3) have just added a powerful new noise reduction tool using artificial intelligence (as well as some great enhancements to HDR capabilities and more noted at the bottom of this post).
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