How to track the conversion?

Question

contextual advertising

I try myself in contextual advertising, I found my first client. We agreed to pay for the targeted action, in the current case, the sale and subscription to news. Is there a ready-made solution to track the target action on the site. I think there are affiliate program scripts, or other ways. For example, how does admitad track the target action?

Answer 1

Yandex.Metrika, Google Analytics