Editing involves assembling shots in a film to shape its rhythm, pace and narrative. Key techniques include cuts between shots, dissolves where shots blend together, and transitions like fades. Editing styles include parallel editing of simultaneous actions, matching shots for continuity, montage using unrelated shots to imply meaning, and adjusting shot length to control pace. Famous examples like the Odessa Steps sequence in Battleship Potemkin demonstrate how editing can emphasize drama through a rapid, discontinuous style.