Begin with the concept
Identify the idea you want to explain without copying the lesson text. Write the question a reader would ask about that idea. Explain it in your own words and consult original public documentation to check technical details. Your notes are a research aid rather than a finished publication.
Add your own application
Demonstrate the concept with a website you built, a spreadsheet you created, or a clearly labelled hypothetical campaign. Explain what you changed and why. Distinguish an observed result from an assumption. Practical evidence helps the reader apply the idea rather than merely memorize a definition.
Respect source material
Do not publish course PDFs, instructor slides, textbook extracts, or assessment banks without permission. Cite sources when you rely on them and use only material you have rights to share. Create your own diagrams and examples where possible. Avoid presenting a qualification or result you have not earned.
Edit for an unfamiliar reader
Remove course codes and references that only your class understands. Define unfamiliar terms, use headings that answer questions, and end with a useful next step. Ask whether the article adds something beyond a summary of a lesson. If it does not, add an example or demonstration before publishing.
Your next step
Your most useful contribution is an original explanation supported by a real application.