This article, Chakra Suppression Technique, contains content taken directly from our mother site. All credit of such content is reserved the original authors over at Narutopedia, the original article can be read here: "Chakra Suppression Technique".
This ability allows the user to suppress their chakra to the point that it is completely undetectable. This makes it impossible for sensor-type shinobi to track them via chakra.
The downside of this ability is that since the user suppresses their chakra, they are unable to use sense other targets by chakra. When Karin uses this technique, she is unable to use her Mind's Eye of the Kagura technique.