The document discusses how a user's digital fingerprint allows their online activity to be tracked. A digital fingerprint is unique to each computer and is created from factors like IP address, settings, programs used, and websites visited. This fingerprint can be used by websites, the police, and companies to identify a specific user and track their online behavior across the internet. On an online learning platform like the eLC, this means instructors can see if a user accessed assignments, forums, or videos and when they did so.