A web tracker is the JavaScript library on your pages that builds and sends hits. gtag.js is Google’s. Matomo has its own. Each decides what is collected, which cookies are set and where requests go.
Why It Matters
The tracker is where consent is enforced and where cookies are created. It is also the part of your analytics setup that ad blockers and browser privacy features interact with, so it should be small, transparent and respect the choices your visitors make.
In d8a.tech
The d8a.tech web tracker is a drop-in replacement for gtag with the same API. When analytics_storage consent is denied, it sets no analytics cookies.