Keep the offer, proof, and CTA consistent through checkout
Control the campaign's material facts in one truth table, assign an owner, and test that every promise survives from ad to the final pre-payment total.
A campaign can be accurate in separate pieces and still fail as one customer journey. The ad uses an old price. The landing page shortens the qualification. The PDP pulls a different product fact. The cart applies only part of the promotion. Nobody owns the contradiction because every team owns one surface.
The decision: control every material campaign fact in one truth table, then test the live route through the final pre-payment order summary or total shown by the store. Copy approval is not enough.
The rest of this lesson is available once the Atlas is unlocked.