How to show ads only to those who were on one url but were not on another url?

Question

contextual advertising

Let's say a person saw page 1, but didn't see page 2.
How to show ads only like this?

Answer 1

It is necessary to set up retargeting for an audience according to a certain condition.
You create a condition where in one set of rules you specify that goal 1 (view page 1) should be completed, in another set you specify that goal 2 (view page 2) should NOT be completed.
In an ad network campaign, run an ad that targets this condition.