You can't optimize what you don't measure. Every blog post about conversion optimization, A/B testing, or paid ads assumes you have reliable tracking in place. But most developers set up analytics as an afterthought — dropping a script on the page and calling it done.
Source: [Dev.to](https://dev.to/codetocash/conversion-tracking-for-developers-from-zero-to-full-funnel-visibility-10pi)