What Is Online Tracking?
Online tracking is the practice of collecting data about your internet activity — which websites you visit, what you click, what you buy, how long you stay on a page, and more.
Who Tracks You?
Advertising Companies
Google, Facebook, and ad networks track you across millions of websites to build a profile for targeted advertising.
Analytics Services
Services like Google Analytics track how you use websites. Website owners use this data, but it's also available to the analytics provider.
Data Brokers
Companies that buy and sell personal data profiles. They combine online tracking with public records to create detailed profiles.
Social Media
Facebook, Instagram, and Twitter track you even when you're not on their platforms — through embedded "Like" buttons, share widgets, and tracking pixels.
How Tracking Works
1. Cookies
Small files stored in your browser that identify you across visits. Third-party cookies from ad companies track you across different websites.
2. Tracking Pixels
Invisible 1x1 pixel images that load from tracking servers. When the pixel loads, the server records your visit.
3. Browser Fingerprinting
Collecting your browser, device, and system characteristics to create a unique identifier — no cookies needed.
4. URL Parameters
Links with tracking parameters (like ?utm_source=... or ?fbclid=...) identify where you came from and track your click.
5. Login Tracking
When you're logged into Google, Facebook, or other services, they can track your activity across all websites where their services are embedded.
How to Stop Tracking
1. Install an Ad and Tracker Blocker
The most effective single action. DNDShield blocks:
- Third-party tracking cookies
- Tracking pixels (Google Analytics, Facebook Pixel, etc.)
- Fingerprinting scripts
- Known tracking domains (100+ blocked)
2. Use Private Browsing / Incognito
Prevents cookies from persisting between sessions. Doesn't block tracking during the session.
3. Review Browser Privacy Settings
- Chrome: Settings → Privacy → Third-party cookies → Block
- Firefox: Settings → Privacy → Enhanced Tracking Protection → Strict
- Edge: Settings → Privacy → Tracking prevention → Strict
4. Use a Privacy-Focused Search Engine
Switch from Google Search to DuckDuckGo or Startpage. Google Search tracks every query and ties it to your profile.
5. Audit App Permissions
Mobile apps often have more tracking than websites. Review permissions and disable unnecessary location, camera, and contact access.
What Data Is Collected About You
| Data Type | Who Collects | How It's Used |
|---|---|---|
| Browsing history | Ad companies | Targeted ads |
| Search queries | Ad targeting + product improvement | |
| Location | Apps + websites | Local ads + analytics |
| Purchase history | Retailers + ad companies | Product recommendations |
| Social connections | Social media | "People you may know" |
| Device info | Analytics | Fingerprinting |
FAQ
Can I be completely untraceable? Practically no. But an features" class="doc-internal-link">ad blocker, cookie management and privacy-focused tools together cut out a large share of it — the third-party pixels and cross-site cookies that do most of the everyday tracking. What stays hardest to avoid is tracking by services you're logged into, which no blocker can undo for you.
Is tracking illegal? GDPR (Europe) and CCPA (California) require consent for tracking. Many companies still track without proper consent. An ad blocker enforces your preference regardless.
Does incognito mode stop tracking? No. It only prevents cookies from being saved after you close the window. Fingerprinting, IP-based tracking, and logged-in tracking still work.