TL;DR
- Copywriting is writing that asks for one action now and is measured by conversions; content writing informs and builds trust and is measured by traffic and rankings.
- Google Ads responsive search ads cap headlines at 30 characters and descriptions at 90, and each line must make sense alone because Google recombines them.
- AIDA, usually credited to E. St. Elmo Lewis in the late 1890s, PAS and FAB are the three most used frameworks for structuring copy.
- AI speeds up drafts and ad variations, but unedited AI copy tends to be generic and can state claims that are not true for the product.
What is copywriting? Copywriting is writing designed to make a reader take a specific action, such as buying, signing up, calling or clicking. It covers ads, landing pages, product pages, emails and calls to action, and it is judged by results: a piece of copy works if more of the right people do the thing it asks. Content writing, by contrast, mainly informs or educates, and is judged by attention, trust and search visibility over time.
Copywriting versus content writing
The two overlap, and the same person often does both, but they have different jobs. A blog guide explaining how Google Ads bidding works is content writing: it earns attention and trust, and may bring visitors from search for years. The headline and three lines of an ad promoting a Google Ads audit are copywriting: they have a few seconds to earn a click from a specific person with a specific problem.
| Aspect | Copywriting | Content writing |
|---|---|---|
| Main goal | A specific action now | Information, trust and discovery over time |
| Typical length | Words to a few hundred, long-form sales pages excepted | Hundreds to thousands of words |
| Typical formats | Ads, landing pages, product pages, emails, CTAs | Blog posts, guides, case studies, newsletters |
| How it is measured | Click-through, conversion rate, revenue per visitor | Traffic, time on page, rankings, assisted conversions |
The main copywriting formats
Ads
Search ads work inside strict limits. A Google Ads responsive search ad uses headlines of up to 30 characters and descriptions of up to 90, and Google combines them in different orders, so each line has to make sense on its own. Social ads have more room but less attention: the first line has to stop a scroll before the reader sees the rest.
Landing pages
A landing page has one job, matching the promise of the ad or email that sent the visitor and removing the reasons not to act. Good landing page copy states the offer in the headline, shows who it is for, answers the main objections (price, risk, effort, trust) and repeats one clear call to action.
Product and service pages
These pages serve people comparing options. Copy should lead with the benefit, then give specific details a buyer needs to decide: what is included, sizes, delivery times, guarantees, and what makes the product different from the alternative the reader is weighing.
Email copy is split between the subject line, which earns the open, and the body, which earns the click. The subject line should say what is inside or why it matters now. The body should stay on one message with one main link.
Microcopy and calls to action
Button labels, form hints and error messages are copywriting too. "Get my free audit" tells the reader what happens next; "Submit" does not. Small wording changes on forms and buttons are among the cheapest things to test.
Frameworks: AIDA, PAS and FAB, with examples
Frameworks are checklists that stop copy from skipping a step. The examples below are illustrative and written for a fictional Bangkok dental clinic.
AIDA: Attention, Interest, Desire, Action
AIDA is usually credited to the American advertiser E. St. Elmo Lewis in the late 1890s. It orders a message from grabbing attention to asking for action. Example: "Nervous about the dentist? (Attention) Our Sukhumvit clinic uses gentle, step-by-step treatment explained before we start. (Interest) Most check-ups take under an hour, with Saturday appointments available. (Desire) Book online in two minutes. (Action)"
PAS: Problem, Agitate, Solution
PAS names a problem, makes the cost of ignoring it concrete, then offers the fix. It suits services people put off. Example: "That tooth sensitivity is not going away on its own. Left alone, small cavities can turn into root canal treatment. A 30-minute check-up now shows exactly what needs attention."
FAB: Features, Advantages, Benefits
FAB translates specifications into outcomes. Example: "Digital X-ray (feature) means results on screen immediately (advantage), so you leave your first visit knowing your treatment plan and cost (benefit)." FAB is especially useful for technical products where the writer understands the features better than the buyer does.
How to write copy that also ranks
Landing pages and product pages often need to convert visitors and rank in search. The two goals can support each other if you plan for both.
- Use the words customers search for in the page title, main heading and early copy, in natural sentences.
- Keep the conversion elements, the offer, proof and call to action, above the fold, and put longer explanatory sections and FAQs further down the page, where they help rankings without burying the action.
- Write a title tag and meta description that work as ad copy for the search result: a clear benefit and a reason to click.
- Answer the questions buyers ask before purchase on the page itself, in plain headed sections, because those answers also serve search engines and AI answer engines.
- Avoid hiding essential text inside images, where search engines cannot read it reliably.
How to brief and evaluate a copywriter
A good brief does most of the work. It should include:
- The single action the copy must drive, and how it will be measured.
- Who the reader is, what they already know, and what they are worried about.
- The offer, with prices, conditions and deadlines that are allowed to be stated.
- Proof you can legally and truthfully use: reviews, certifications, guarantees, real numbers.
- Tone of voice and words to avoid, plus any regulated claims in your industry.
- Where the copy will appear and its character limits.
To evaluate copy, read it as the target customer would. Can you tell in five seconds what is offered and for whom? Is every claim specific and supportable? Is there one clear next step? Then test: run two headlines or two CTAs against each other where traffic allows, and judge by conversions rather than opinions.
Where AI helps and where it quietly hurts conversion
AI writing tools are fast at producing variations, summarising product details and suggesting headlines within character limits. They are useful for first drafts and for generating many ad variations to test.
They also have predictable weaknesses. Unedited AI copy tends to use the same stock phrases as everyone else, makes vague claims that sound confident, and can state features or guarantees that are not true for your product. Generic copy blends into every competitor's ad, and false claims create legal and trust problems. Use AI for volume and structure, then have a person who knows the product and the customer edit for accuracy, specificity and voice.
What this means in the Thai market
Thai copywriting has its own habits. Thai readers on social platforms respond to conversational tone and familiar phrasing, while B2B and healthcare buyers expect more formal language. Many Thai searchers mix Thai and English terms, so landing page copy often needs both, for example the English product name with Thai explanation. Thai has no spaces between words, which affects how lines break on mobile and how long a headline feels, so review copy on a phone before publishing. Regulated sectors such as health products, cosmetics and finance have advertising rules in Thailand that restrict certain claims, so check claims against the relevant authority's guidance. For planning copy across channels, see content marketing; for pages built to convert, landing page design; for a consistent voice, brand identity; and for subject lines and sequences, email marketing.
Copy review checklist before anything goes live
- The headline states the offer or benefit clearly.
- The copy matches the promise of the ad, email or link that leads to it.
- Every claim is true, specific and approved where your industry requires it.
- Objections are answered: price, risk, effort, trust.
- There is one main call to action, worded as what the reader gets.
- Character limits are respected on every placement.
- The copy reads well on mobile, in both languages where both are used.
- A way to measure the result is set up before launch.
FAQ
What is copywriting in simple words?
Copywriting is writing that persuades someone to take an action, like buying or signing up. It is used in ads, websites, emails and product pages.
Is copywriting the same as content writing?
No. Copywriting aims for an immediate action and is measured by conversions, while content writing informs and builds trust over time and is measured by traffic, engagement and rankings.
What are the most common copywriting frameworks?
AIDA, PAS and FAB are the most widely used. AIDA moves from attention to action, PAS goes from problem to solution, and FAB turns features into benefits.
Can AI write good copywriting?
AI can write useful drafts and variations quickly, but unedited AI copy is often generic and can include inaccurate claims. A human editor who knows the product and customer should check and refine it.
How do I know if my copy is working?
Measure the action the copy was written for, such as click-through rate, form submissions or sales, and test alternatives against each other. Opinions about wording matter less than conversion data.
If your ads, landing pages or emails bring traffic but not enough enquiries, Relevant Audience can review the copy, build test variations and measure what actually moves conversions.
