Testing creatives on Push.House is quite direct. When setting up your campaign, you can upload several ad titles and images. The platform then rotates them during the campaign, letting you see which one performs best. It's a good idea to change only one thing at a time, like keeping the same title but switching the image, or keeping the image and testing different headlines. This helps you understand what exactly is working. Also, keep your creatives short and clear since push ads are small in size. Start with three or four versions and monitor which one gets the most clicks. After you find the best one, you can pause the others and scale that one. Testing different angles or messages can also help you reach more people. It would be interesting to hear what kind of creatives others are using and how they decide what to test first.