Cherry Seed

How do ad blockers affect my conversion tracking?

ad blocker conversion tracking ad blocker impact analytics blocked conversions tracking script blocking ublock origin tracking server-side tracking ad blockers

Quick Answer

Ad blockers prevent tracking pixels and JavaScript tags from loading, which means conversions that happen after ad clicks go unreported. This creates an attribution gap: your ads are driving real revenue but your analytics shows fewer conversions than actually occurred. On average, ad blockers cause 25-40% of conversion events to go unrecorded, leading to underreported ROAS and skewed optimization signals for ad platform algorithms.

Full Answer

Ad blockers work by preventing scripts from loading. When a user visits your site with an ad blocker active, your tracking scripts never execute. No script, no data, no visibility. What Gets Blocked Almost always blocked:

  • Facebook Pixel (connect.facebook.net)
  • Google Ads conversion (googleadservices.com)
  • Google Analytics (google-analytics.com)
  • TikTok Pixel (analytics.tiktok.com)
  • Any third-party tracking domain Often blocked:
  • Hotjar, FullStory, session recorders
  • Chat widgets with tracking
  • A/B testing tools
  • Retargeting pixels Usually NOT blocked:
  • Your own domain's requests
  • Core website functionality
  • Server-side API calls How Blocking Works Ad blockers use filter lists (EasyList, EasyPrivacy, etc.) that match: Domain-based rules: Path-based rules: Pattern matching: The Complete Blindness When Facebook Pixel is blocked:
  • No PageView event
  • No ViewContent event
  • No AddToCart event
  • No Purchase event
  • User doesn't exist in Facebook data That user's entire journey—from click to purchase—is...

Sources

Programmatic Access

GET https://seresa.io/wp-json/cherry-tree-by-seresa/v1/seeds/83

Cite This Answer

Cherry Tree by Seresa - https://seresa.io/seed/data-loss-adblockers/adblocker-impact