Great points so far! I’d add that it’s crucial to ensure your mockups are as realistic as possible to simulate real user interactions. Testing different elements one at a time often gives more insightful results, especially when testing things like copy, images, or even font size. However, testing larger changes, like an entirely new design, can also be effective, as long as you have enough traffic to draw solid conclusions. Just make sure to use analytics tools to track user behavior and make data-driven decisions based on those results!