Tailoring is the single highest-leverage thing you can do per application. Most people either skip it or over-do it until they only manage five applications a week. Here's the disciplined middle.
You touch exactly three things. The rest of the resume is a fixed base you never rewrite per role.
1. The headline / summary line (3 minutes). Read the JD's first paragraph. Whatever business problem the role exists to solve, name it in your opening line using their words.
2. The top three bullets of your most recent role (12 minutes). Reorder so the bullet most relevant to the JD's biggest priority sits first. Rewrite the framing to mirror the JD's language. Keep your numbers, change the emphasis. "Grew net retention 22 points" stays; what you put around it shifts toward this role.
3. The skills section (5 minutes). Cut skills that don't apply. Add the JD's required skills that you genuinely have but didn't list. The ATS weights this section heavily.
That's it. 20 minutes. Five tailored applications in the time most people spend on one full rewrite, each one more relevant than a rewrite would have been.
The base resume does the heavy lifting. The 20-minute tailor makes it land for this specific role.
— Dr. Hosney Adel