I've encountered phrases such as
Он говорит о том, что...
Which seems to mean something like "He says that...", ie "He says that the store is closed" or something ("Он говорит о том, что магазин закрыт"?).
My questions are:
What precisely does this sentence mean, and how does it compare to other (if there are other) sentence structures for saying "He says that..." ?
Is "Он говорит что..." on its own not correct? This would be closer to the English "He says that...".