In photography, a close-up refers to an image where the subject is captured at a short distance, filling the frame with detail. Close-up photography allows photographers to highlight textures, patterns, and small subjects that might otherwise go unnoticed, making it popular for portraits, macro work, product photography, and nature photography. By focusing closely on the subject, photographers can create images with strong visual impact, emphasize details, and draw the viewer's attention to specific elements within the frame.