Closed Captioning is the process of adding time code letters to a video, which is used in the creation of subtitles. Captions are broken down into three categories in accordance with their content: dialogue, sound effects, and music. In this manner, the audience can have an understanding of the content and can have better understanding of the movie. For example, if you have watched a movie in a foreign language that is being played in the cinema hall, you can understand the movie if you have closed captions because it tells you what the characters are saying. If you are deaf or hard of hearing, you will know the movie plot because these captions tell you what the characters are saying or what sounds are being played in the movie. Another example is if you are watching a movie in a noisy environment or can't hear clearly because of any issue, closed captions will be helpful. You will be able to watch the movie without any problem. Considering the disadvantages that a person who is deaf or hard of hearing face, closed captions are really helpful. They make it easier for the audience to understand the plot of the movie.