Ecommerce ad copywriting formulas with examples

How do you write ecommerce ad copy, and which formulas work?

Ecommerce ad copy is a short text that promises one benefit to one audience and makes the next step obvious. The AIDA, PAS, Before-After-Bridge and Feature-Benefit formulas give you ready-made skeletons. Once you pick a formula, trim the copy to each platform's limits, put the strongest benefit in the first line and make sure every claim can be substantiated.

Copy often lives in the shadow of the visual, yet it is usually the copy that persuades the person the visual stopped to actually click. It is also the cheapest and fastest part of a creative to test: shooting a new video takes days, writing a new headline takes minutes.

What should you clarify before writing ad copy?

Before any formula, you need answers to three questions:

• Who are you writing for? Not "everyone", but a person with a specific need or situation. Example: "Young couples furnishing their first home on a tight budget."
• Which single benefit are you promising? The product may have ten features, but one should lead the ad.
• What do you want the user to do? Buy, browse, check the size guide, claim an offer.

Without these answers, even the best formula produces scattered copy.

Which ad copy formulas are most used in ecommerce?

Formula	Structure	Best for
AIDA	Attention, Interest, Desire, Action	New products, cold audiences
PAS	Problem, Agitate, Solution	Products that fix a clear pain
Before-After-Bridge	Current state, desired state, product as bridge	Transformational products (home, care, organisation)
Feature-Benefit	Feature, the advantage it gives, personal benefit	Technical or comparison-heavy products
Social proof	Customer experience, result, invitation	High-trust or high-price products

AIDA example

Example: an ergonomic office chair brand.

• Attention: "Back aching by the evening?"
• Interest: "Adjustable lumbar support adapts to the way you sit."
• Desire: "Get up from your desk comfortable, not worn out."
• Action: "Find the model that fits you."

PAS example

Example: a tablecloth in stain-resistant fabric.

• Problem: "Another stain after every meal."
• Agitate: "Wash, iron, and the same panic before the next dinner party."
• Solution: "Fabric that does not absorb spills and wipes clean with a damp cloth."

Do not overdo the agitate step. The goal is recognition, not fear.

Before-After-Bridge example

• Before: "Clothes tumbling out every time you open the wardrobe."
• After: "A wardrobe where everything has a place and you are ready in two minutes."
• Bridge: "With our foldable organiser sets."

Feature-Benefit example

"Double-walled stainless steel (feature) keeps heat in for longer (advantage), so your coffee is still hot when the meeting ends (benefit)." Copy starts selling the moment the benefit lands in the reader's own life.

Social proof example

Example: a handmade soap brand.

• Experience: "I spent years looking for a soap that suits my sensitive skin."
• Result: "Two months in, my skin no longer feels tight."
• Invitation: "Start with the trial size."

The review used in this formula must be real and come from a verified purchase. Under Turkey's current rules, consumer reviews without purchase verification may not be used in ads, and many other markets restrict fake or unverified testimonials too.

What are the character limits for Meta and Google ad copy?

The formula gives you a skeleton; the platform sets the size:

• Meta: Meta's ads guide recommends 50 to 150 characters of primary text and 27 characters for the headline in feed ads. The full text of a long caption may not be visible at first glance in the feed, so the strongest benefit belongs in the first line.
• Google responsive search ads: You can provide up to 15 headlines and 4 descriptions per ad. Headlines are up to 30 characters and descriptions up to 90. Because the system assembles combinations, Google advises making each headline meaningful on its own, and pinning 2 or 3 assets to a position rather than pinning everything.

For Google search ads, write headlines from different angles: product name and category, main benefit, shipping or returns advantage, social proof, offer. Five headlines that repeat the same idea in different words leave the system nothing real to test.

How do you write ad copy step by step?

1. Collect customer language. Read product reviews, support messages and FAQs. Customers' own words are the most persuasive ad copy there is.
2. Pick the single benefit. Which satisfaction or pain comes up most often in reviews?
3. Choose the formula. Clear pain: PAS. Sense of transformation: Before-After-Bridge. Technical product: Feature-Benefit.
4. Write long, then cut. Ignore limits in the first draft, then trim to the platform's limit.
5. Write the first line separately. The part visible in the feed must stand on its own.
6. Prepare at least three variations. Different benefit, opening or formula.
7. Check the evidence. Is there documentation behind every concrete claim?

What should you avoid in ad copy?

• Marketese: In Nielsen Norman Group's classic study, 79% of test users scanned any new page and only 16% read word by word. The same research found that concise, scannable, objective text was far more usable than promotional writing. Words like "unique", "perfect" and "revolutionary" carry no information.
• Formatting gimmicks: Google's editorial policy restricts capitalisation, punctuation and symbols used in gimmicky ways to grab attention. On Meta, excessive capitals and exclamation marks also erode trust.
• Claims you cannot prove: Advertising rules in most markets require claims to be truthful and substantiated. In Turkey, for example, the Regulation on Commercial Advertising and Unfair Commercial Practices requires ads to be truthful and honest, and requires claims about verifiable facts to be backed by reports from universities, accredited testing bodies or independent research organisations. Do not write "reduces hair loss by 90%" unless such a report exists. Environmental claims and discount announcements are subject to additional specific rules.

Ad copy must also match the promise on the landing page. If the page does not deliver what the ad promised, users bounce; our guide on how to build a landing page for ads covers that alignment.

How do you know which ad copy wins?

When testing copy, keep the visual fixed and change only the text. On Meta, track primary text variations; on Google, review asset performance in your responsive search ads. The decision metric should be cost per purchase or return on ad spend, not click-through rate: copy that earns lots of clicks but no sales may be setting the wrong expectation. For broader test design, see our guide on how to test Meta ad creatives.

If you would like to review your ad copy and creative testing together, you can request a free growth analysis from the Performetic team via our contact page.

Key takeaways

• Good ad copy tells one audience about one benefit and one next step.
• Choose AIDA, PAS, Before-After-Bridge, Feature-Benefit or social proof based on the product type.
• Meta recommends 50 to 150 characters of primary text and a 27-character headline; Google RSA headlines are 30 characters and descriptions 90.
• The language in customer reviews is the most persuasive copy source.
• Claims must be truthful and substantiated; in Turkey, verifiable claims need independent reports.