Caption is a type of text that is used to explain, clarify, or describe an image, video, or other visual content. Generally, captions are brief phrases or sentences that appear below the associated visual content. Captions are often used to add context to an image or video, and to make the content more accessible for viewers. There are several types of captions, including closed captions, open captions, and subtitles. Closed captions allow viewers to control the amount of text displayed on their screens. Open captions are hard-coded for the video and cannot be turned off. Subtitles are similar to closed captions but are often used to transcribe dialogue.