Case Study Format for AI Search Ranking | Template That Gets You Cited
I was sitting with a plasterer in Stevenage last month, going through his website. He'd done this gorgeous extension job, total transformation, and his case study was three photos and a sentence. "Another happy customer!" Exclamation mark and everything.
And look, I get it. You're busy. You finished the job, the client's thrilled, you snap a few pictures and throw them on the site because that's what you've always done. But those three photos and that sentence? Invisible. Completely invisible to ChatGPT, to Perplexity, to Gemini. The AI tools people are actually using now to find local tradespeople and service businesses. They can't see your photos. They can't parse "another happy customer" into anything useful.
So your best marketing asset, the proof that you're good at what you do, is doing nothing for you in the places where recommendations are actually happening now.
Your case studies are probably formatted for 2019
I've been doing digital marketing for fifteen years. Ran SEO campaigns, PPC, social media, the lot. And for most of that time, case studies were a trust signal. Someone lands on your website, reads about a job you did, thinks "yeah, these lot seem decent" and picks up the phone.
That still happens. But there's a second thing happening now, and most local businesses are completely missing it.
AI search tools are crawling your website and deciding whether to recommend you. Not rank you. Recommend you. Someone types "best electrician near Hitchin" into ChatGPT and it doesn't show ten blue links. It gives a direct answer. Names a business. Sometimes two or three. And the businesses it names? Their websites gave the AI something concrete to work with.
A case study format that helps AI search ranking isn't some fancy template you buy. It's about structuring what you already know in a way these tools can actually read and quote.
The summary block thing
Right, so about eighteen months ago I started putting a plain-text summary at the top of every case study we wrote for clients. Dead simple. Looks like this:
``` Client: Independent dental practice Location: Letchworth Problem: 40% no-show rate on hygienist appointments What we did: Automated SMS reminders + prepayment deposit system Result: No-shows dropped to 11% within 6 weeks ```
Nothing clever about it. But I've watched ChatGPT pull information from these blocks almost word for word when someone asks a related question. The AI doesn't have to dig through your flowing prose to figure out what happened. You've handed it the answer on a plate.
Two minutes to write. Probably the highest-return two minutes you'll spend on your website.
Stop writing like a brochure
OK so this is where I get a bit ranty.
I read case studies from local businesses all week. Every week. And the same thing keeps happening. Business owner does brilliant work, gets great results, then writes about it like they're applying for an award. "Our bespoke, tailored approach enabled us to deliver outstanding results that exceeded expectations."
Mate. What did you actually do?
AI tools can't cite waffle. They need specifics. They need the kind of detail that answers a question someone might actually ask. Compare these two:
"We improved their online visibility and customer acquisition through our proven digital strategy."
vs.
"We set up 11 service-area pages targeting specific towns, connected their booking system to Google Business Profile so availability showed in search, and built an automated email sequence that brought back 23% of old customers who hadn't booked in six months."
The second one is quotable. The first one is noise. And I know writing like that feels exposing, like you're giving away your secrets. You're not. Nobody's going to read your case study and replicate your entire business. What they ARE going to do is hire you because an AI tool cited that specific, impressive detail when they asked for help.
Get the numbers in there
AI tools love numbers. Short short short sentences about this because it's simple.
Don't say "increased revenue." Say "revenue went from £6,400 to £11,200 per month between April and August." Don't say "saved time." Say "cut admin from 12 hours a week to 3."
And stack your metrics where you can:
- Monthly revenue before and after
- How many new enquiries per week
- Hours saved, actual number
- What did they spend with you vs what they got back
- Customer retention, if you've got it
You won't have all of those for every project. Fine. Whatever numbers you've got, put them in plain text. Not inside an infographic. Not baked into an image. Text.
One page per case study
I audit a lot of websites around North Hertfordshire. Baldock, Hitchin, Royston, all over. And I keep seeing the same bloody mistake. Twenty case studies crammed onto one page at `/our-work` or `/portfolio`.
AI agents cite URLs. Specific URLs. When ChatGPT references your work, it can point someone to a page. If all your projects live on one long scrolling monster, the AI can't figure out which project it's supposed to be quoting. So it usually just... doesn't. Moves on to someone whose site makes it easier.
Every case study gets its own page. Its own URL. With a slug that describes what it is.
`/case-studies/booking-system-letchworth-dental-practice`
Not `/our-work#section-7`
The thing I accidentally discovered about updates
We rewrote case studies for a roofer in Baldock last year. Proper job, structured format, numbers, the lot. Good results. Then about four months later his client rang him, wanted a second property done, left a five-star review mentioning the first job.
I went back to the original case study and added an update section at the bottom. Dated it. Three sentences. "Four months on: client has referred us to two neighbours and commissioned a second project. New review: 'Wouldn't use anyone else.'"
The case study started appearing in more AI responses within a couple of weeks.
Now I do this for every client. Past customer comes back? Update the case study. They leave a review? Add it. The results you delivered have a longer tail than expected? Write it up. Date it. AI crawlers treat updated content as more trustworthy than static pages, and it makes you look more professional to human visitors too. Win win.
FAQs at the bottom, sometimes
I go back and forth on this. Some case studies benefit from three or four questions at the end. Things a potential customer would wonder after reading it:
- "What if my practice is smaller than this one?"
- "Do I need to change my existing booking system?"
- How long before we'd see results like these?
The logic is simple enough. People ask AI tools questions. If your case study contains those questions with answers, you're matching the exact format of the query.
But don't bolt them on for the sake of it. If it reads like filler, bin it. I'd say half our case studies have FAQs and half don't.
What actually matters underneath all of this
After three years of AEO work I keep coming back to the same test. Can an AI agent grab any single section of your case study, drop it into a response, and have it make sense on its own?
The summary block at the top. The problem description. Your list of what you did. The results. Each one should stand alone as an answer to a question someone might ask.
That's the case study format that helps AI search ranking. Not a template. Not a word count target. Not a design thing. Just, can your work be quoted?
Because right now someone in Hitchin or Stevenage is asking ChatGPT who to hire. And the answer is coming from whichever business made their proof easiest for the AI to understand and repeat. Yours, or the other lot's.
If you want to sort your case studies out, or you're curious what AEO looks like for a local business, we work across North Hertfordshire. Or grab a quick call and I'll tell you what I'd change on your site. No obligation, no pitch deck, just a look at what's there.