Small, gold-plated or solder-masked copper circles on the surface of the board.
If you are a hobbyist or technician working with a device featuring these markers, here is the standard workflow for utilizing them: kmgd test point
As devices get smaller (like wearables and smartphones), physical KMGD test points are becoming tinier and harder to reach. This has led to the rise of testing, which tests the board internally through software. However, for power delivery and high-speed analog signals, the physical KMGD test point remains an irreplaceable tool in the engineer's arsenal. Small, gold-plated or solder-masked copper circles on the