How to do noise reduction in Lightroom

from https://digital-photography-school.com/how-to-do-noise-reduction-in-lightroom/

How to reduce noise in an image shot at a high ISO with the Detail panel in Lightroom

from http://www.slrlounge.com/school/how-to-reduce-noise-in-an-image-shot-at-a-high-iso-with-the-detail-panel-in-lightroom-4/