Ad tracking: what it is, and how it affects you

Ad tracking is the process of collecting information about how you interact with websites and apps in order to deliver, measure, and improve advertising. It commonly uses browser and device signals (for example, identifiers stored in the browser or app), and it can build a profile over time.

Because ad tracking is often implemented inside the websites and ad networks you visit, turning it off is not only a “network” problem—it’s also a “how the site identifies you” problem.

Norton Secure VPN (and VPNs in general): what it does

A VPN (Virtual Private Network) routes your internet traffic through an intermediary server. In practice, this typically changes the IP address that websites see and can reduce some forms of tracking that rely on IP/location signals.

However, a VPN is not the same as an ad-tracking blocker. If a website can still identify you through other signals (such as browser behavior, logged-in account activity, or persistent identifiers), ad measurement and personalization can continue even while your IP changes.

Key differences and where each helps (and doesn’t)

1) Primary goal

  • Ad tracking tools/limits: target how advertising systems identify and measure you (often via browser/app identifiers and third-party scripts).
  • A VPN: targets how your connection is routed, mainly affecting IP-based visibility.

2) What signals can be affected

  • A VPN can help with signals connected to your network path (for example, the IP address presented to sites).
  • Ad tracking can continue if identification still occurs through browser/app identifiers, accounts, or other non-IP signals.

3) Typical limits

  • A VPN won’t automatically remove ads, block trackers, or stop analytics embedded in pages.
  • Ad-tracking reduction measures won’t necessarily protect you against network-level observation on public Wi‑Fi in the same way a VPN can.

4) The key exception to understand If you are logged into an account that carries profile data, both ad personalization and measurement may still happen regardless of VPN usage. In that situation, the biggest change usually comes from account-level controls and privacy features, not only from changing your connection path.

Which is best for you: a decision checklist

Pick based on what you want to reduce:

  • If your main concern is ad measurement and personalization inside the browser/app, prioritize ad-tracking reduction approaches (browser privacy settings and tracker controls) and understand that a VPN alone may not be enough.
  • If your main concern is privacy on untrusted networks (for example, public Wi‑Fi) or reducing IP-based tracking signals, a VPN can be a useful layer.
  • If you want both, the most practical expectation is layering: VPN for connection-path protection, plus additional controls for tracker/identifier reduction.

Uncertainty to keep in mind: the exact degree of tracking reduction depends on how the sites/apps identify you and which privacy features you use alongside the VPN. Because details vary by browser, website, and configuration, you may need to test changes using your own browsing experience and network-visibility expectations.