Digital watermarking techniques are broadly classified into two principal categories based on their visibility and robustness: visible watermarks and invisible watermarks. Visible watermarks superimpose a recognizable, translucent logo or text directly over a digital image or video, allowing human viewers to instantly identify ownership while discouraging unauthorized theft or casual copying. Invisible watermarks, conversely, embed hidden data steganographically into the underlying frequency or spatial domains of the file so that it remains imperceptible to the human eye or ear, yet can be extracted by authorized detection software to verify authenticity and trace illicit distribution pathways.