Notes on click tracking

What we learn building the infrastructure: how redirects work, what invalid traffic really looks like, and what the platforms expect from a tracker.

Measurement

Why your click counts never match

Google Ads says 1,240 clicks. Your tracker says 1,187. Neither is broken. Here is where the gap comes from and how wide it is allowed to be.

Fundamentals

Anatomy of a tracking link

Every part of a tracking URL does a job: the redirect path, the identifier, the destination, the campaign parameters. Here is what each one is for.

Fundamentals

What a click tracker actually does

A click tracker sits between an ad and a landing page, records the visit, then forwards the visitor. Here is what that buys you, and what it does not.

Ad fraud

What invalid traffic actually costs you

Not every click is a person. Scrapers, monitoring tools, competitors and inflated affiliate volume all bill at the same rate as a real visitor.