Noise reduction becomes especially valuable when you are working with high ISO files, low-light travel photography, events, interiors or smaller-sensor cameras.
The purpose is not simply to remove visible noise. The harder job is reducing noise while preserving the detail and surface texture that makes the photograph feel believable.
PhotoLab 10 includes DeepPRIME 3 and DeepPRIME XD3 for supported RAW files, combining denoising with demosaicing. These are existing image-quality technologies, rather than new version-10 features. Availability depends on the edition, file and hardware; they do not apply to JPEG or TIFF files, or Apple ProRAW.
Use the quality the image actually needs
Compare the available denoising modes in the preview and check a finished export at 100%. More aggressive settings can change fine texture; choose the mode and strength that suit the photograph rather than relying on ISO alone.
Again, the photograph should dictate the workflow rather than simply turning the most powerful option on for everything.