I'll share a "shadow" experience...
Last year I had issues with my left shoulder. I had a bodywork therapist work on it and one day as he worked that area, I issued a sigh that was identical to the sigh I give when I read a "stupid" email from someone at work. And I was like, ah-ha!, there is a physical manifestation of this part of my shadow self, the one that is afraid of everyone thinking it is stupid - that's the part that made me tense up my posture, because part of the allure of my day job is that people don't ever think I'm stupid...

Ok, now how this translates to real world action, I'm still working on... But I will say that once I made the connection between the shadow part and my physical pain, the pain gradually went away after about a year of being there.
Shadow work is an ongoing process! And I think it happens on various levels as well - personal, cultural, etc. Look at what's happening in the USA... some major shadow work going on there!