Walk A Mile In Someone's Shoes Meaning

(idiomatic) To experience what someone has experienced.

Example: 1994, Colin Escott et al., Hank Williams: The Biography,[1] Little, Brown and Company (1995), ISBN 978-0-316-24938-6, page 225:
  It's likely that he didn't begrudge what he had paid Marshall though, because he thought he had finally found a medical person who had walked a mile in his shoes.