You can start by looking at the Assets Chart. From here, you can watch out for any pieces of copy that appear in the overspend section on the bottom right area of the graph. These pieces of copy are spending more money than they are bringing in. Therefore, the ads using these pieces of copy should have their budget reduced, or you should pause them.
Subsequently, you should watch out for any ad copy elements that appear in the scalable section at the top left of the graph. These pieces of copy are more profitable while spending less of your ad budget. Therefore, you should duplicate the ads containing these elements or increase the ad budget.
Overall, you should use these insights as a basis for writing your ads. When you identify the copy elements that perform, they indicate that you should use them in creating your next ads to improve the chance of profitable results.