Most small business owners write their own ads the same way they write a text message: quickly, without a plan, hoping something sticks. Then they spend money running those ads and wonder why nothing's converting.
The truth is that ad copy is a craft. Professional copywriters spend years learning how to write headlines that stop the scroll, hooks that pull people in, and calls to action that make people click. They get paid well for it — because it works.
But here's what's changed: AI knows that craft. You can now get copy that follows proven frameworks, speaks to your exact customer, and is tailored for each platform — in under five minutes. You don't need to hire a copywriter. You need a good prompt.
This guide walks you through exactly how to do it, with real prompts you can copy and use today.
What's in this guide
Why Most Small Business Ads Fall Flat
Before we get to AI, it helps to understand why most small business ads don't work. It almost always comes down to one of three problems:
- They talk about the business, not the customer. "We've been serving the community for 20 years" tells me nothing about why I should buy today.
- No clear hook. The first line doesn't stop anyone mid-scroll. It just blends in with everything else.
- Weak call to action. "Learn more" doesn't make anyone do anything. "Book your free 15-minute call today — only 3 spots left this week" does.
AI fixes all three of these — but only if you tell it the right things. The quality of your ad copy is directly tied to the quality of information you give the AI. Garbage in, garbage out. Good context in, great copy out.
The Four Ad Formats AI Handles Best
How to Write the Perfect Ad Copy Prompt
Most people write prompts like this: "Write me a Facebook ad for my bakery." Then they're disappointed when the output is generic.
A good ad copy prompt gives the AI five things:
Facebook and Instagram Ads
Facebook/Instagram ads have three parts: the hook (first 1–2 lines before the "See More" cutoff), the body copy, and the headline below the image. Here's a prompt template you can use right now:
Business: [describe what you do in 1–2 sentences]
What makes us different: [your key differentiator — price, speed, quality, specialty]
Target customer: [who is most likely to buy — their situation, age, pain point]
Goal: [what you want them to do — book a call, visit the site, use a code, etc.]
Tone: [friendly / urgent / professional / playful]
For each variation, give me:
- Hook (first 1–2 lines that stop the scroll)
- Body copy (3–5 sentences explaining the offer)
- Headline (under the image, 10 words max)
- Call to action button text
Make each variation use a different angle: one emotional, one logic/data, one urgency, one social proof, one question.
Real example: local gym
Here's what that looks like filled in for a local gym:
What makes us different: No contract, friendly community atmosphere, all fitness levels welcome. $49/month flat rate.
Target customer: Adults 30–50 who've tried big box gyms and hated the intimidating atmosphere or got locked into contracts.
Goal: Get them to claim a free 7-day trial pass on our website.
Tone: Warm, community-feel, no hype.
With that context, AI will produce five distinct, polished ads — each hitting a different psychological trigger. You pick the best two, test them, and keep the winner.
Google Search Ads
Google ads are stricter: headlines are 30 characters max, descriptions are 90 characters max. This is where AI really shines — it can count characters and hit keyword targets simultaneously while keeping the copy compelling.
- Headlines: 30 characters max (write 10 variations)
- Descriptions: 90 characters max (write 4 variations)
Business: [what you do]
Target keyword: [the search term people use to find you, e.g. "plumber Austin TX"]
Top benefit: [the #1 reason someone should choose you over competitors]
Offer or differentiator: [e.g. "same-day service", "free estimate", "no contract"]
Make the headlines punchy and benefit-focused. Include the keyword naturally where it fits.
Add character counts in parentheses after each line.
Email Subject Lines
Your email subject line determines whether your email gets opened or deleted. Studies consistently show that a great subject line can increase open rates by 30–50% compared to a mediocre one. AI can test every possible angle for you in seconds.
What the email is about: [e.g. "promoting our summer sale — 20% off everything this weekend only"]
Who it's going to: [e.g. "existing customers who haven't bought in 90 days"]
Goal: [get them to click and buy before Sunday]
Write 4 variations of each style:
- Curiosity (makes them wonder what's inside)
- Direct offer (just tells them the deal)
- Personal/conversational (sounds like a message from a friend)
- Urgency (time or quantity limited)
- Question (makes them think about their own situation)
Keep all subject lines under 50 characters. No clickbait — they should deliver on what they promise.
Twenty subject lines, five different styles, in under 30 seconds. Pick the three that feel most "you," test them on small segments, and send the winner to everyone else.
How to Test and Improve Your Copy
Writing good copy is only half the job. The other half is testing it. Here's a simple process that works for any budget:
Mistakes to Avoid
Even with AI, there are ways to go wrong. Here's what to watch out for:
- Using the output word-for-word without reading it. AI sometimes writes things that technically make sense but sound a little off. Read everything before you publish. Edit it to sound like you.
- Not giving enough context. "Write me a Facebook ad" gets you generic output. The more specific your prompt, the better the result. Don't skip the customer description.
- Running only one version. You don't know what works until you test. Always run at least two variations against each other.
- Making the copy all about features, not benefits. Nobody cares that your product "uses proprietary technology." They care that it saves them 2 hours a week. Ask the AI to focus on the benefit to the customer, not the feature of the product.
- Forgetting the call to action. Every ad needs one clear next step. Tell the AI exactly what you want people to do — and make sure that action is in the copy.
- Using the same copy forever. Set a reminder to refresh your ads every 3–4 weeks. It takes 10 minutes with AI. Stale copy kills results.
Quick Reference: Ad Copy Prompts by Format
| Format | What to give the AI | What to ask for |
|---|---|---|
| Facebook/Instagram | Business, target customer, goal, tone | 5 variations: emotional, logical, urgency, social proof, question |
| Google Search | Target keyword, top benefit, differentiator | 10 headlines (30 chars), 4 descriptions (90 chars) with character counts |
| Email Subject Lines | Email topic, audience, goal | 20 subject lines across 5 styles, all under 50 chars |
| Instagram Captions | Photo subject, tone, call to action | 3 caption variations + 10 relevant hashtags |
| Retargeting Ads | What they viewed/added to cart, why they didn't buy | 5 "come back" variations addressing likely objections |
Want more ready-to-use prompts and templates?
The Ask Patrick Library has done-for-you templates for every stage of marketing — ads, emails, social posts, sales pages, and more. Used by hundreds of small business owners who don't have a marketing team.
Browse the Library →