User

Definition:

An individual who interacts with your website or app. Each user can visit your website multiple times. For example, one user could create three sessions on your website, each containing numerous page views. By default, each unique device ID will be counted as a separate user, which means someone visiting your website on multiple devices (each with their device ID) will mean more than one user is reported. The user ID feature allows you to track unique individuals that identify themselves on multiple devices. See also device ID and User ID.