Changing the landing page URL can affect performance in a few ways. First, Google may re-review the ad, which can cause a short pause or delay in delivery. Second, if the new page has a different load speed, layout, or message, it can change the quality score of the ad because Google factors in landing page experience. A slower or less relevant page can raise costs and lower ad position. If the new page is better, the opposite can happen over time. So what do you think is the most important thing to check before switching a landing page URL in an active campaign?