To create a new savings bucket, tap the Money Tab on the bottom, then scroll down to the Buckets section. Tap the "+" button to add a new bucket.
You can manage your buckets by tapping on the Tools button in this section.
Creating a new bucket allows you to choose from a variety of common, preset ideas, as well as the option to customize your bucket and icon to whatever you'd like. You have the ability to set a target amount for your savings goal, as well as the option to set a target date to make sure you reach those goals on time.