How are hard cuts and transitions used in film and television? Zhongpeng’s instructions for editing

If it’s a hard cut, just jump from one screen to another, such as a front-reverse shot of two people talking.

A transition is to switch from one scene to another. For example, at the end of a scene, the camera moves to something black (pillars, night sky, etc.) and the screen is completely black, and then moves away to another scene.