Found this on the net

Executive orders are published in the Federal Register and are legally binding. They give presidents the power to create unilateral directives, though they can be overturned if a court rules they’re unconstitutional. Executive orders remain in place until rescinded or modified by a president, reversed by a court or nullified by legislation.

Executive actions, by contrast, bear little weight. They’re not published in the Federal Register and aren’t subject to legal review. But these so-called threats-to-orders often draw reactions as sharp as the responses to orders themselves.