How to calculate the conversion for each utm tag in Google Analytics?

Question

Facebook

There is a Facebook ad campaign. Each ad has a utm tag. In Google Analytics, I see the number of clicks for each label. I need to understand how many of those who came to the site made a purchase.

The unpaid and paid order pages have the same URL. But the text in the button is different (on the first "pay", and on the second "download").

How do I "tell" the analytics: "Count how many of those who came by this label saw a button with the text "Download"?

Answer 1

It was necessary from the very beginning to set the corresponding target to the visibility of the "download" button