What is it?
Some tasks require more work than others to get a successful outcome. But at the same time, users only have a limited amount of time and mental energy. So it can be tricky to balance the amount of work users are comfortable with and what is needed by the system for the task to be completed. Having users jump through too many hoops or asking the wrong questions can lead users to fail in one way or another, whether it's botching the process, procrastinating, or avoiding engaging with your product altogether. And if users absolutely have to complete the task, because their manager requires they do, or because of an upcoming deadline, they'll do it but may feel frustrated and view your brand negatively.
Examples

Overly complicated opt-out interface

Onboarding quiz with many questions

Complex and difficult path to customization

Inefficient interface for creating workouts



