Refers to a profile of individuals’ or entities’ online interactions and behaviors. The identity is a collection of data about an individual, organization, or electronic device that exists online. It includes unique identifiers and usage patterns used to recognize individuals or their devices across the digital ecosystem. They are often tied to identifiers such as usernames, passwords, or device IDs like Internet Protocol addresses. These identifiers are needed for authentication processes — to determine how individuals and devices are recognized and verified across the internet.

An array of data points may be used in constructing digital identifiers: username and password combinations, purchasing behaviors or transaction histories, birth date, social security number, online search activities and electronic transactions, and medical history. These data points form the detailed profile of individuals' or entities' online interactions and behaviors.

Digital identities are commonly used by website owners and advertisers to track users and tailor content delivery that aligns with users’ preferences and behaviors.