How to Redirect users to offer page?

Hi there, i need to find a way to redirect users that are coming from payed traffic (pop up) on my own blog to the offer page(affiliate link).

Scheme: traffic source -> my blog -> offer page

But all the other users that are coming organically shouldn’t be redirected. They should be able to surf through all the articles without any redirects.

As well as i would like to redirect users from a certain article to a certain offer