Continuity editing refers to techniques used in film and television to maintain a clear and coherent narrative through seamless editing. It establishes spatial relationships and prevents confusion by following rules like the 180-degree rule for camera placement and shot/reverse-shot patterns. Maintaining continuity is important for an undetected edit and smooth storyline comprehension. Key techniques include establishing shots, match cuts, and eyeline matches to subtly embed edits while preserving the flow and understanding of a scene.