Draft A/B ad copy with AI

Give it the product, audience and channel, and you'll have copy from several different angles in minutes.

Step by step

1. 1

   Lay out the product, audience and channel

   The same product needs very different copy on an Instagram feed and in a search ad. Say who will see it, and where, first.

   Product: a 10-minute home workout app for busy professionals
   Audience: people in their 30s who feel they have no time to exercise
   Channel: Instagram feed ad
   Goal: sign-ups for a 7-day free trial

2. 2

   Ask for different angles

   "Write five headlines" tends to produce five similar lines. Naming angles — benefit, objection handling, social proof — gives you variations actually worth testing.

   Using the brief above, write ad headlines — one per angle:
   1) Time-saving benefit
   2) Breaking the myth that workouts must be long
   3) Results other users have seen
   Add one line on who each headline is likely to work for.

   1) Time saved: "Ten minutes before work is enough" — for people who keep putting exercise off because they're busy.

   2) Myth-busting: "Forget the idea that a workout has to be long to work" — for people who started, then quit for lack of time.

   3) User results: "Ten minutes a day, a different morning a month later" — for people who need to see change before they act. Swap in real reviews or data if you have them.

3. 3

   Fit the channel's limits

   If the channel has character limits, give the exact number. Once the length fits, read the lines aloud and ask for fixes where they sound off.

   Channels also count differently — Google Ads, for instance, counts each character of some languages, such as Korean, as two.

   Give me three versions of headline 2 in 40 characters or fewer, including spaces.

   Workouts don't have to be long (30 characters)

   Long workouts aren't the only way (33 characters)

   Ten minutes beats the workout you skip (38 characters)

   Check it

   • Assistants often miscount characters. Check with a character counter, using the channel's own counting rules.
   • Read each line aloud and ask again only for the parts that trip you up.
4. 4

   Check facts and claims

   AI can invent convincing numbers and results. Always check that no unsupported figures or exaggerated claims, like "lose 10 pounds in two weeks," have slipped in.

   Claims to catch, and safer rewrites

   What the AI might write	Problem	Safer version
   Lose 10 pounds in two weeks	Unsupported number	Ten minutes a day you can actually keep up
   Guaranteed results for everyone	Promised or exaggerated effect	A routine that survives your busiest days
   Chosen by 100,000 users	Unverified track record	Use only with real data

   Check it

   • Match every sentence with a number or a promised effect against evidence — internal data or real reviews.
   • Advertising law generally requires evidence for factual claims before the ad runs — in Korea, under the Fair Labeling and Advertising Act. Health, finance and other regulated areas have extra rules, so involve legal too.