Ads have very little space and very little time. A reader scrolling past gives you a second. Good ad copy makes one clear promise, backs it with one specific reason, and tells people what to do next. Here is how to write it.

One ad, one promise

The most common mistake is trying to say everything. An ad that mentions price, quality, speed, service and sustainability says nothing memorable. Choose the one thing that matters most to your customer, and build the ad around it.

Ask: of everything I could say, what would make this customer stop and pay attention?

The three parts

Headline. This is the part most people read. It should state the promise or the benefit, ideally in a few words: "Run lighter. Run longer." Make it specific. Numbers, results and clear nouns beat vague adjectives.

Body. One or two sentences that give a reason to believe the headline. This is where your unique selling point goes: the specific thing that makes you different. "The lightest daily trainer under 200 g" is a reason. "Premium quality" is not.

Call to action. Tell people what to do: "Shop the sale", "Start your free trial", "Book a call". Use a verb, and make the next step obvious.

Find your unique selling point

Your unique selling point, or USP, is the reason someone should pick you over the alternatives. To find it:

  • List what you do better, faster, cheaper or differently.
  • Check which of those a competitor could not honestly claim.
  • Choose the one that matters most to your customer.

If your USP could appear in a competitor's ad word for word, it is not unique yet. Make it more specific.

Write like a person

Use plain, short words. Write to one person, using "you". Avoid jargon, and avoid claims that nobody would believe, such as "the best in the world".

Read the ad aloud. If it sounds like a brochure, rewrite it as if you were telling a friend.

Be truthful

Honest advertising is not only the right thing to do. It is also a legal requirement in most places, and platforms can reject ads that break their rules.

  • Only claim what you can prove.
  • Do not promise guaranteed results, especially for health, money or jobs.
  • State the terms of an offer clearly, including when it ends.
  • Disclose sponsored content as required where you live.
  • Check the policy of each ad platform, because many restrict certain topics and wording.

Test, don't guess

The only way to know which copy works is to try it. Write two or three versions that differ in one way, such as the headline, and compare the results. Keep the one that performs better, and test the next change. Small, steady tests beat a single big guess.

Fit the format

Each platform has its own limits for headline and body length. Write for the tightest limit first, then expand where there is room. A search ad may allow only a few words per line, while a social ad allows a short paragraph.

Using a generator

An Ad Copy Generator can produce a headline, two sentences and a call to action from your product and USP. It is useful for creating several options quickly. Then:

  1. Make sure every claim is accurate.
  2. Shorten the text to the platform's limits.
  3. Replace general words with specific ones.
  4. Test the best two or three.

Checklist

  • Is there exactly one promise?
  • Is the USP specific and true?
  • Would a stranger understand it in two seconds?
  • Is there one clear action?
  • Does it follow the platform's rules?