Showing versus Telling

Dear Barbara,

One of the most common pieces of advice I've heard since I started writing a few months ago is to 'Show Don't Tell'. I've also heard some say this means we should write the scene like it's a movie playing out in front of us. Unfortunately, I'm not very good visualizing cinematics, nor do I understand the concept of Show Don't Tell completely. Could you shed some light on what it means and examples of how one might go about doing this?

In any story, half of the information given to the reader is never spoken out loud. It's body language, and body language can tell your reader what your character is doing and how they feel about it.