What you are probably seeing
You see a sudden drop in total sessions or page views even though your traffic sources have not changed.
Your conversion reports look inconsistent, with some users appearing to abandon the funnel before they even load the final page.
Why it happens
Ad blockers target standard script calls used by client-side analytics to prevent tracking, so data sent from the user’s browser is often blocked before it reaches your platform.
When the browser blocks the tracking code, the server never receives the ping, creating a gap in your data that looks like a performance drop.
What changed recently
Step by step
1. Review your current analytics setup to identify which tags are running on the client side in the user’s browser.
2. Move the tracking logic to your web server or a backend cloud function so the data is recorded when the event happens.
3. Test the new setup by using a browser extension that blocks ads to verify the data still arrives correctly.
4. Compare the new server-side data volume against your historical averages to confirm the gap is closing.
5. Ensure your privacy policy and terms of service are updated to reflect the new data handling method.
Ways to go further
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