Digital footprint or digital shadow refers to one's unique set of traceable digital activities, actions, contributions, and communications manifested on the Internet or digital devices.[1][2][3][4] Digital footprints can be classified as either passive or active. The former is composed of a user's web-browsing activity and information stored as cookies. The latter is often released deliberately by a user to share information on websites or social media.[5] While the term usually applies to a person, a digital footprint can also refer to a business, organization or corporation.[6]