Google Analytics

you are an ecommerce or lead-generating website, then the standard JavaScript tag won’t track deep data about orders on your website. You’ll have to implement a custom JavaScript tag on your order confirmation/thank you page.

In addition, you can also measure what pages these Visitors read, their Bounce Rate, how many days it took them to convert, and their Loyalty and Recency metrics.

We are all familiar with untagged campaigns and pages. We also know that URL parameters sometimes fail to help us collect data.