In Photoshop, an untagged image refers to a file that does not contain an embedded ICC colour profile. Without a profile, the image lacks defined colour management, which can result in inaccurate colour representation when opened on different devices or software.
Photographers and digital artists must assign or embed a profile to untagged images to ensure consistent and accurate colours across devices. Understanding how to manage untagged files is essential for colour-correct workflows, professional printing, and maintaining the integrity of digital images.