Basically you learn to accept good and bad thoughts as they pass through your mind with adding a judgement on the thoughts. I learned it as part of a meditation. It puts your mind at rest. Like something could be happening that you don’t like but you’re passive In judgement which prevents kinda thought spirals where things keep getting worse. Like let’s say I’m having anxiety....I might think something like oh no I’m having anxiety but this stops me from thinking other things like oh I must have done something terrible to have such anxiety or whatever...
Hope that makes sense....