Review successful vs failed transactions
You will find a basic comparison between successful and failed transactions in the behavior panel.
Drill down the error category to compare validation errors with transaction errors.
And even further down to identify a specific widget instance for each error category.
See the transaction interval for the various transaction via selecting a secondary dimenstion and selecting "Product Variant"
Checkout Behaviour Analysis
See customer drop off in each step. Are you donation targets to hight? Do you not offer the right payment methods for your customers? Do you have returning visitors?
Review product performance
If you are using multiple widgets type such as Ela or Lema you can compare their performance via the ECommerce Shopping Analysis Product Performance pane:
Drill down on a specific widget to review performance of specific instances of that widget or compare performance for different widgets.
Compare the success of your campaigns on the Product Performance pane by using the Product Category Dimension. Which of your promoted donation purposes perform well?
And again drill down to identify high performing widgets and their instances: