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Data about data (like time, device, and sender).

Definition

Metadata is information about a message or activity, not the content itself—like who contacted whom, when, from where, and on which device.

In plain English Data about data (like time, device, and sender).

Why this matters

Why it matters: Metadata can reveal patterns about your life even if the message content is encrypted.

Example

Example: An encrypted chat may hide what you said, but metadata can still show you talked to someone at 2 AM.