Leo 投放了一个新广告推广活动。在营销管理工具中查看了推广活动表现后，他希望改进其广告素材。他应该怎么做？

When optimizing ad creative, changing one element at a time allows you to isolate the impact of that specific change on performance. This scientific approach helps you understand what works and what doesn't, leading to data-driven improvements. If you change multiple elements simultaneously, you won't be able to definitively attribute any performance shifts to a particular modification, making it difficult to learn and apply insights to future campaigns. Thoroughly overhauling the entire ad creative without understanding individual component performance is also inefficient and risks discarding effective elements.