Choose material you can discuss
Select an example where you understand the context and your own contribution. It does not have to be a large account or a dramatic turnaround. A clear explanation of a careful investigation is valuable when the reader can follow your decisions.
Give the reader a route
Use a simple sequence: the question, the available information, the approach and what you learned. Include only visuals that help explain the reasoning. If a screenshot needs a long spoken explanation, consider whether a short written description would be clearer.
Make fictional work obvious
A learning exercise can demonstrate an approach, but it should never be presented as client work. Label invented data and scenarios beside the example. Explain which assumptions you made and which parts would need confirmation in a real account.
Review permissions
Check that you can share each document, number and image. Redacting a company name may not remove all confidential information. When permission is unclear, describe the process without exposing the underlying account or ask the appropriate owner first.
Invite a useful conversation
End with a question or a reflection. You might explain a different approach you would test now, a limitation you noticed later or the kind of feedback that would improve the work. This creates a better opening than an unsupported claim of expertise.