A copywriter writes the words that get someone to act: buy, sign up, click or call. That means ads, landing pages, sales letters, video scripts, emails and the copy on the checkout itself.
Most of the job happens around the writing. A copywriter researches the buyer, picks the angle and the offer, drafts, and then rewrites based on what the page sells. In direct response, the number decides whether the copy was good.
If I could pay a copywriter for only one thing, I'd pay for the research.
The US Bureau of Labor Statistics puts it in one line: "Copywriters prepare advertisements to promote the sale of a good or service." True, and about as useful to a seller as "a surgeon operates on people".
I spent nine years as CTO of a direct-response company, building the funnel system and the checkout the copy ran on. From that side of the desk, a copywriter is the person whose work shows up in the conversion rate within a day of going live. Picture two pages selling the same bottle to the same Meta audience: same price, same product photo, same checkout. One opens with the ingredient list. The other opens with the moment the buyer noticed the problem. Those pages can sell at very different rates, and the only difference between them is what the copywriter did.
What a copywriter does, step by step
The writing is the smaller part. The rest is finding what to say and checking whether it worked.
- Research. Reviews of the product and its competitors, refund reasons, support emails, forum threads, the ads already running in the niche. The goal is the buyer's own words for the problem.
- Angle and offer. One problem, one promise, one deal. A page that argues three angles at once usually sells none of them well.
- Draft. The headline and the lead get most of the time, because a reader who stops there never sees the rest. Then proof, the offer, the guarantee and the close.
- Test. The new copy runs against the current page, the control, on the same traffic.
- Read the result and rewrite. Sales and revenue per visitor decide what stays. The losing version still tells you something about the buyer.
When a page stops converting, the first thing I look at is what changed in the research, usually the ad that sends the traffic. A page written for one ad's promise reads oddly to a visitor who clicked a different one.
What copywriters write for a paid-traffic funnel
On a funnel that buys its traffic, almost every screen between the ad and the thank-you page has copy someone wrote on purpose:
| Funnel step | What the copywriter writes | What it has to do |
|---|---|---|
| Ad | Hook, primary text, headline, video script | Earn the click from the right person |
| Presell or advertorial | An article-style story or a quiz | Warm up a cold visitor before the pitch |
| Sales page | A long-form text sales letter or a VSL (video sales letter) script | Make the case and present the offer |
| Checkout | Guarantee, order bump line, button text | Keep the buyer from leaving at the last step |
| After the sale | Upsell pages, confirmation, emails and SMS | Raise the order value, bring the buyer back |
If you sell with video, the video sales letter template breaks a VSL script into its parts. The small pieces get skipped most. An order bump is one sentence and a price, and it gets the same buyers the sales page worked hard for. I'd give that sentence as much attention as the headline. The email campaigns after the sale are copy too, and on a product people reorder they can earn more than the first page did.
Copywriting vs content writing
Both jobs put words on a page. They answer to different numbers, on a different clock.
The comparison is between two kinds of writing job, and the line between them blurs in practice. An advertorial reads like an article and gets measured like a sales page. A blog post (this one included) is content, with a call to action at the end that is pure copy. Plenty of writers do both, and many are better at one.
If you sell through paid traffic, hire for the column your money depends on. A content writer who has never had a page judged on CPA will need a few rounds to get used to it.
What is direct response copywriting?
Direct response copy asks for an action you can count, right away, and is judged by how many people take it. Most paid-traffic copy is direct response whether the writer calls it that or not, because every click has a price and every sale can be traced back to the page.
That makes copy quality something you can put in dollars. Same ads, same audience, two versions of the page (illustrative numbers):
| Same $1,000 of ads at a $1 CPC | Current page | New copy |
|---|---|---|
| Clicks | 1,000 | 1,000 |
| Conversion rate | 2% | 2.5% |
| Sales | 20 | 25 |
| CPA | $50 | $40 |
A 20% lower CPA on the same ads is the kind of change that lets a campaign scale. It also shows why copy gets tested and not judged by eye.
The catch is the sample. Twenty sales against twenty-five on 1,000 clicks can easily be luck. To tell 2% from 2.5% reliably, the sample size calculator asks for about 13,800 visitors per variant (95% confidence, 80% power). At a $1 CPC that's around $27,600 of traffic for one test. So copy tests on small budgets should go after big changes, like a new angle or a new lead, where the gap is wide enough to show up sooner.
How a copywriter's work gets judged
In a split test: the new copy and the current page share the traffic, and the one that sells more per visitor stays.
- Same URL, same ads. Building the new version at a new address means a new ad or a changed link, and the test then measures the ad change along with the copy.
- One idea per test. A new headline is one test. A new headline, new price and new video is a redesign, and if it wins you won't know why.
- Sales over clicks. A headline that gets more people to scroll can still sell less. Judge on purchases and revenue per visitor.
- Enough sample. Decide the size before launch, from the calculator, and wait for it.
This is where the product side comes in. In ElasticFunnels a split test serves each version under the page's existing URL, so the ads keep running untouched, and a component split test can swap only one block, such as the headline, without building a second page. The Conversion Comparison card then shows each variant's conversion rate against the control:
When a headline wins, the Headlines library keeps it so the next page can start from it. If you work with a copywriter, the split testing page shows how tests run under one URL. Every feature is on every plan.
Read the result like a skeptic. A big lift on a few dozen sales tends to shrink once more traffic arrives, so I'd treat an early winner as a lead and keep the test running to its planned size. The split testing guide walks through the setup.
Do you still need a copywriter with AI?
AI writes a passable first draft quickly. In ElasticFunnels the AI page builder does exactly that: describe the page and the offer, and you get an editable page with its layout and copy. That moves the copywriter's time away from typing and toward the parts a model does badly.
- Research a model hasn't seen. Your refund reasons, your call recordings, what your buyers said in last month's support emails.
- Picking the angle. A model gives you the average of what it has read, and the average angle is the one your competitors already run.
- Claims. Somebody has to check that each promise on the page can be backed up.
- Reading the test. Deciding what a lost test says about the buyer, and what to try next.
I'd use AI to get five headline drafts and a page skeleton in an hour, then hand them to someone who knows the buyer. The draft got cheap. Knowing which draft to run did not.
Hiring a copywriter: what to ask
If you're the seller, a few questions sort the candidates quickly:
- "Show me a page that ran on paid traffic, and what it did against the page before it." A writer who has been tested will have numbers, or at least a clear story of a win and a loss.
- "What do you need from me?" Good answers ask for reviews, refund reasons, customer calls and your current numbers. A writer who needs only the product name will write about the product name.
- "How do you handle claims?" In health offers this decides whether the page survives an ad review. The FTC's Health Products Compliance Guidance says health claims need "competent and reliable scientific evidence", and it covers what a page implies as well as what it says.
- "What's the first test you'd run?" The answer shows whether they think in tests or in finished pages.
Start small. Pay for new headlines and a new lead on your current page, run them against the control, and let the result decide whether they write the rest of the funnel.
- A copywriter who asks for your refund reasons before writing a word is worth more than one with a prettier portfolio.
- Give the order bump line and the upsell headline to your best writer. They're read by buyers who already said yes once.
- If the budget can't reach the sample a small change needs, test a different angle instead of a different adjective.
- Keep the losing versions. Three lost tests on the same page usually point at the offer, and no headline fixes an offer.
A copywriter's job, in a funnel that pays for every click, is to change one number: how many visitors become buyers. The writing is the visible part. The research before it and the test after it are where good copywriters earn their fee, so hire for those, measure them in sales, and keep the pages that win.
