Answer:
The purpose of a caption is to provide a brief description or explanation of the content of an image, video, or other visual media. Captions are typically placed beneath or next to the visual media that they are describing, and are intended to provide additional context or information that may not be immediately obvious from the image itself.
Captions can serve a variety of purposes, depending on the context in which they are used. In news or journalism, for example, captions may be used to provide information about the location, date, or subject of a photo or video. In educational materials, captions may be used to explain complex concepts or processes that are illustrated in an accompanying image or diagram.
Overall, the purpose of a caption is to provide additional information or context about the content of a visual media, which can help viewers to understand and engage with the material more effectively