A caption is a text box that displays information about an image, video, or other object on a web page. The text in a caption is typically smaller than the main text on the page, and is often used to provide additional information about the object that is being captioned. Captions are often used to provide descriptions of images for people who are unable to see them, such as people with visual impairments. They can also be used to provide translations of text that appears in images. In some cases, captions may be used to provide alternative versions of an image for people with different screen sizes or devices. Captions are typically placed below an image, but they can also be placed above or to the side of an image. The placement of a caption will often depend on the size and orientation of the image being captioned.