Separate requirements from preferences.
Read the posting line by line. Identify explicit required qualifications, helpful extras and practical constraints such as location or work arrangement. Do not assume every sentence has equal weight.
Find evidence before changing wording.
For each important requirement, look for a real example. Record the original project or role it comes from. A keyword match is only a starting point; the scope must fit too.
Keep responsibilities with the right employer.
Do not move an achievement into another job because it reads better there. Keep dates, titles and employers accurate. Use a separate projects section when that is the clearest truthful structure.
Make gaps visible to yourself.
If a requirement is missing, decide whether it is a sensible stretch, something to clarify or a reason to pass. A fabricated claim creates an interview problem rather than solving an application problem.
Save the version you submitted.
Keep the posting and the final CV together. Before an interview, review exactly what the employer received so your examples and claims stay consistent.