J cuts: When the audio from the next scene plays before the image changes.

An example of when a J cut is used is in the opening scene of Ferris Bueller’s Day Off, where the audio plays before the opening scene, meaning that the audience are already intrigued in what is going on before seeing it.

L cuts: When the audio from the first scene carries over to the next scene.

An example of when an L cut is used is in the film Knives Out, multiple times in this scene.

It is used so the new information given to the audience is explained through visuals.

Both J cuts and L cuts are often used in dialogue to make conversations flow and feel more natural.