Technical Definitions

The 180 degree rule:

This is about where you position the camera on set. There is a figurative line between the two characters on set and a 180 degree arc is created where the camera can be placed. The eye line matches of the two characters.

Shot reverse shot:

This is where the camera continually cuts between the two characters on screen using the 180 degree rule.

Match on action:

This is where an action has been started in one shot, and then we see it completed in another.

 Continuity editing:

This is the predominant style of editing. It is used to smooth over discontinuity and make a coherent scene.