Choose one user and one goal
List user groups and choose the one with the clearest need. Describe the action they need to complete and the result they expect. The initial scope should focus on that action.
Include the end of the journey
A form needs success and error states. An order page should tell users whether their order was received. These details make a product usable and trustworthy.
Measure what you need to learn
Before launch, identify the questions to answer: can users complete the task, where do they stop, and what brings them back? Prioritize improvements based on actual observations.