Explain movement along the Demand curve versus a shift of the Demand curve?

Explain movement along the Demand curve versus a shift of the Demand curve?
movement on the curve is simply things going along as expected, like ok I want that and other people do too, so the demand curve is high. A shift occurs when the demand changes, like I found something new and everyone wants that thing now, so the demand for that other thing has shifted because nobody wants it anymore.