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Storing third‑party cookies separately per site, so they can’t track you as easily.

Definition

Cookie partitioning means the browser keeps third‑party cookies separated for each website you visit.

In plain English Storing third‑party cookies separately per site, so they can’t track you as easily.

Why this matters

Why it matters: It reduces cross‑site tracking because the same tracker can’t reuse one cookie everywhere.

Example

Example: A tracker’s cookie works on Site A but not automatically on Site B.