Why it matters: It’s important to make sure that new users of your product have a smooth learning experience. Once they are already familiar with the product, give them tools to help move faster through the flows. It will improve the product's usability and retention. For example, you can use shortcuts for expert users and tooltips for novice users, etc.
How to test it: First of all, check whether you have tools for both audiences. Then, conduct usability tests with both novice and expert users to see whether the tools are being used properly.