One reason to pay attention to the blogosphere is that with judicious screening, one can find good advice.
A site that is entertaining, helpful, and thought-provoking is the Terrible Minds site of Chuck Wendig. He's often quite funny, but also gives good writing advice to help the medicine go down.
And so he's done it once again, with an explanation of Show vs Tell, one of those things you'll hear ad nauseum if you're a writer.
He breaks it down to describe what the differences are, and how they matter in writing.
Yes, required reading!