Statistically, the easier your checkout is to use the higher your chances are of converting traffic into paying customers.
One simple way to do this is to do away with unnecessary fields.
For example, if you are selling software or downloadable products then you don’t really need their billing or shipping address (unless you are using it for marketing purposes).
We can easily tell WordPress to remove these fields under the conditions that every single product in the cart is a virtual / downloadable product.
Below is an example of our super clean, super simple checkout