For most small businesses, the most useful number in a marketing case study is the smallest one. A percentage tells you the direction. The starting number tells you the size. And the proof worth more than either is the kind you can confirm without anyone’s permission — a page that’s still live, an ad that’s still running, an owner who’ll take your call. A percentage only earns weight when the company behind it started roughly where you’re starting.
Case studies are the one piece of evidence a marketing company controls end to end. They choose the client. They choose the window and the metric. They choose where the chart begins. That doesn’t make them dishonest, but it does make them incomplete, and the missing pieces are exactly the ones that decide whether the same result could happen at your business.
Five Kinds of Proof, Ranked by What They Predict
Proof comes in tiers, and the tiers aren’t close together. Here’s what you’re likely to be handed, ordered from the easiest thing to shape to the hardest.
| Kind of proof | What it proves | How easily it can be shaped | Can you confirm it yourself |
|---|---|---|---|
| A percentage lift, on its own | The direction of a change | Very easily, because a small starting number makes any gain look enormous | No |
| Before-and-after counts | The size of the change | Harder, because the starting number is sitting right there | Rarely |
| A live walkthrough of the reporting | That the numbers exist inside a real account | Hard | Yes, if you ask for it |
| A client in your position you can phone | That the work held up for a business like yours | Hard | Yes |
| Work still standing on the open web | That the work was done and then lasted | Close to impossible | Yes |
Watch what changes as you move down that table. The proof gets harder to manufacture and easier for you to check on your own.
A Percentage Without a Starting Number Means Nothing
Three hundred percent more traffic sounds like a different company. It can also mean a website went from 40 visits a month to 160. That’s a real improvement and a fair thing to publish. It just isn’t evidence that the same approach moves a business already sitting at 4,000 visits.
One question clears most of the fog. What was the number before? A case study that answers that in its opening paragraph was usually written by someone who expected to be checked.
There’s a legal version of that instinct, and it’s stricter than most owners assume. A case study published on a company’s own website is advertising. Federal guidance for advertisers who feature standout results says they have to either hold proof the result is typical or clearly disclose the generally expected performance for the circumstances shown. You’ll never need to quote that at anybody. Just start noticing how often the second half is missing.
Ask What the Number Was Attached To
Traffic is the cheapest metric to move and the furthest from money. Rankings sit close behind. A case study built on impressions and average position is telling you that work happened, not that it paid for itself. The strongest ones name something an owner would recognize from their own books — calls answered, quotes sent, jobs on the schedule.
That distance between activity and revenue is where most marketing reporting loses people. Seeing the difference between a click, a lead, and a booked job laid out as separate stages makes a case study that stops at traffic look unfinished, because it is.
The Business in the Case Study Has to Resemble Yours
A result transfers when the starting conditions do. Same category, similar market size, comparable name recognition, a website that wasn’t already winning. Change one of those and the number stops predicting much of anything about you.
The most common mismatch is reach, not industry. A company chasing customers across three counties runs a different play than a shop that needs to win one zip code, and moving from a local market to a regional one changes the budget, the patience required, and what even counts as a win. A case study from a business two sizes up will set expectations you can’t fund.
The five things that have to match
Starting visibility, market size, category, budget range, and how long the engagement ran. Those five decide whether a result transfers, and none of them show up in the headline number. If four match and one doesn’t, adjust your expectations and keep reading. If three don’t match, you’re looking at a story about a different company.
Spend and Timeline Are Part of the Result
Two case studies can report an identical lift and describe completely different investments. One took nine months and a serious ad budget. The other was a rewrite of four pages. Strip those details out and both look the same on a slide.
Timeline gets hidden more often than budget does. “Doubled their leads” with no window attached might mean fourteen months, and fourteen months is a long time to fund a strategy on faith. Ask what the first ninety days produced. The honest answer is usually “not much yet,” and hearing that is more reassuring than a hockey stick.
Spend deserves the same scrutiny. What a monthly marketing retainer covers varies enormously from one shop to the next, so a result produced on four times your budget isn’t a result you can price against.
The Proof You Can Check Without Permission
This tier outranks everything above it, and it costs you an afternoon.
Ask for a client you can phone. Not a written quote — a phone number. Owners are candid with each other in a way no case study ever is, and half an hour on the phone with somebody in your position beats any deck. If nobody can be produced, that’s an answer too.
What to look for when you go check
Open the pages the case study describes and read the publish dates. See whether the blog stopped the month the contract ended. Search the business name and look at whether the profile still has recent photos and answered reviews. A program built to last leaves a trail you can follow without help. One built for a screenshot doesn’t leave much of anything.
None of this is an unreasonable ask, either. Under the FTC Act, advertisers must have evidence to back up their claims, and that evidence is supposed to exist before the claim gets published rather than get assembled after a prospect pushes back. Confidentiality is sometimes a real constraint. It’s also the easiest sentence in the world to say.
If you’d rather see that standard applied to your own numbers than to somebody else’s, Spilt Media will open the account and walk through what is moving and what is not.
Which Proof to Ask For, Depending on Where You Are
When you’re choosing between two companies
Skip the decks. Ask each of them for a client in your category you can call, then ask what the first ninety days will realistically produce. The one that gives you the smaller, slower, more specific answer is usually the one telling you the truth.
When you’re deciding whether to copy a tactic
Check three things before you commit a quarter to it: where the company’s traffic started, how long the tactic ran before it worked, and who was doing the work. Plenty of tactics that supposedly stopped working were never affordable at your scale to begin with. A content marketing plan built from your own numbers will outperform one reverse-engineered from somebody else’s win.
When you’ve already hired someone
Stop measuring yourself against the case study and start measuring against your own last quarter. Ask for a live walkthrough of the reporting, in the real account, with somebody answering questions while you scroll. Screenshots are edited by definition.
Where a Case Study Still Earns Its Place
Here’s the honest counterweight to everything above. A case study is still the fastest way to learn whether a company has ever solved a problem shaped like yours, and that’s worth something real. It’s a filter, not a forecast.
We publish them too, which makes this a standard we’re asking to be held to. Spilt Media has been building websites and running search work for Treasure Coast businesses since 2015, so most of the work behind anything we’d point at is still live and still maintained by the same team that built it. You can open it in a browser without asking us for a screenshot.
What you won’t get from us is a ranking or a revenue number attached to a proposal as a promise. Nobody can forecast that honestly, and a case study that implies otherwise is the one to slow down on.
Common Questions About Marketing Case Studies
What should a marketing case study include?
A starting number, an ending number, the window it covers, and what it cost to get there. Anything missing from that list is a gap you’re being asked to fill with trust. Naming the industry and rough market size helps too, since that’s what tells you whether the result has anything to do with you.
Is it rude to ask a marketing company for references?
No, and the reaction to the request tells you as much as the answer does. Any established company has clients who would take a five-minute call. The awkward version of this is the one where nobody can be produced.
Why do case studies use percentages instead of real numbers?
Sometimes confidentiality, sometimes because the real numbers are small. Both happen. A company that can’t share exact figures can usually still give you the order of magnitude — dozens of leads or thousands — and that alone answers most of the question.
Start With the Proof You Can Verify
Pick the two rows from that table you can confirm on your own and start there. Call a client. Open the work in a browser. Read the rest, then discount it by however much context is missing.
And if you want a clear-eyed read on what your own content and search numbers say, starting number included, talk to Spilt Media about a content and search review.