Post production involves several key elements like colour grading, sound, titles and editing to enhance the film and help tell the story. Colour grading can help bring out emotions even in shots that don't seem to need it. Sound effects and music make scenes more realistic and emotional. Titles provide important context and information to audiences about the story. Editing uses techniques like timing, transitions and lighting variation to complete the film and show style while not distracting from the overall aim through overuse of transitions.