Your Ads Results vs. Your Shopify - Why They'll Never Match
Lining up reliable numbers in a growing e-commerce business is one of the biggest frustrations for founders. Your agency results say Meta drove 150 conversions and Google drove 120, but when you check your Shopify dashboard, you’ve had a total of 200 orders.
Something doesn't add up, and you're right to feel confused, but the reason is that platforms and businesses measure success completely differently.
Platforms Measure Different Things
Your agency results look at which platform gets credit for a sale, but multiple platforms can legitimately claim credit for the same sale, and they'd all be technically correct.
Meta's view - "Did someone click on one of our ads before they bought? If yes, we influenced that purchase."
Meta is measuring awareness and early-stage influence. Someone engages with your Instagram ad, it sticks in their mind, and days later when they're ready to buy, they remember you.
Google's view - "Did someone search for your brand or product, click our ad, and then buy? If so, we captured their intent at the moment they were ready to purchase."
Google is measuring demand capture. They're not claiming to create demand, they're saying they were there when the customer was actively looking, so they’re doing their job.
Email's view: "Did someone click our email and then buy? If yes, we closed the sale."
Email is measuring conversion and retention. They're the final touchpoint before the purchase.
So when a customer's journey looks like this:
Sees a Meta ad on Instagram
Searches "your brand" on Google
Clicks a Google brand ad
Lands on your site, signs up for an offer code, leaves
Gets an email the next day
Clicks through and buys
Provided they’re within the given attribution windows, all three platforms can claim credit:
Meta - "We started the journey"
Google - "We captured their active intent"
Email - "We closed the sale"
And they're all right, from their perspective… but you only got one sale.
This Is Called Attribution Overlap, And It's Normal
This isn't a failure of tracking or a sign your agency is hiding something, it's the reality of how advertising works in 2026.
In an ideal world, platforms would agree who gets credit, but they can't, because they all measure different things, which, broadly, are:
Meta measures top of funnel influence
Google measures lower funnel intent
Email measures final-stage conversion
They're not the same thing, but they all impact the sale, meaning the numbers will never match perfectly.
Why Your Attribution Windows Matter
Some brands are tempted to sharpen the edges on attribution in order to see who’s actually knocking the ball into the goal, but if your attribution window is too narrow, you'll miss this full picture.
An attribution window is how far back a platform looks to give itself credit. Meta's current default is 7-day click, 1-day engage-through, and 1-day view. Google's default is 30-day click for Search and Display campaigns, with 1-day view-through, but the right window depends on your business.
If your customers typically convert within a few days, a 7-day window makes sense. If your product is considered and researched for weeks, you need longer. The key is, your window needs to be wide enough to capture how platforms are actually working together in your specific customer journey, and to take into account other activities which might be taking place off the platforms.
Let’s say someone sees your Meta ad (Day 1), googles your brand (Day 3), clicks a Google ad (Day 4), buys (Day 5). Both platforms' default windows catch all of this. But if someone takes 15 days to decide, Meta's 7-day window will miss Meta's influence while Google's 30-day window will still credit Google.
The key is, pick an attribution window that makes sense for your customer journey. Too narrow and you won't see how platforms influence each other, too wide and you'll give credit to touchpoints that happened so long ago they're probably not relevant anymore.
Ready for another layer of complexity? Some sales aren't tracked at all.
Tracking Is Imperfect
On top of attribution overlap, there's also tracking loss. Some customers slip through the cracks.
Cookie loss – When someone browses on their phone, then buys on their laptop the next day, tracking might not connect those events, especially now that privacy regulations are tightening.
Cross-device behavior – Similar issue. Someone sees an ad on mobile, searches on desktop, buys on tablet. Did the ad influence the purchase? Probably. Can we prove it? Not always.
Headless or custom setups – If your Shopify store uses a headless set up or custom integrations, pixel tracking can get messy. Conversions might not fire correctly, or they fire late, missing your attribution window.
So, to re-cap, some sales are double-counted by platforms, and others aren't counted at all, and when your agency results (270 conversions) don’t match your Shopify dashboard (200 orders) it probably means at least 70 conversions have been double counted, but you’ve gained some in Shopify which will never show up in the platform reports, despite them having influence.
So what’s an e-comm business supposed to do?
Stop expecting the numbers to match.The goal shouldn’t be to make the numbers match perfectly, because they never will.
Your agency's results and your Shopify dashboard will always tell different stories. That's not failure, that's how attribution works.
Stop focusing on "which platform gets credit" and focus instead on how each platform contributes to your actual business.
Your real metrics are:
Total revenue – Did you make more money this month than last month?
Total orders – Did you get more customers?
New customers – Are you expanding your customer base, or just getting repeats?
Marketing efficiency ratio (MER) – For every £1 you spent on ads, how much revenue came back? This is your north star (more on this later).
Those are the numbers that matter. And they come from your backend, not your platforms. Platforms still matter, but think of them differently:
Meta = Demand generation. They're building awareness and introducing new people to your brand.
Google = Demand capture. They're there when someone is actively looking for what you sell.
Email = Conversion and retention. They're turning consideration into purchases and keeping customers coming back.
Each one has a job. And each one contributes to the total. But often they can’t claim all the credit.
This reframing changes everything. Instead of worrying about which platform is winning, you can ask, "Are we generating enough demand? Are we capturing enough of that demand? Are we converting efficiently?"
Where Agencies and Founders Get Misaligned
An agency's job is to manage your Meta and Google Ads. So agency reports focus on Meta and Google performance, because that's what they control.
Your job as a founder is different, you need to understand how those ads fit into your entire business, including email, organic search, direct traffic, repeat customers, and word-of-mouth.
An agency can report the ROAS or cost per conversion, but only you know if that cost makes sense for your margins and business model.
That's not a criticism of agencies, it's just a boundary. Your agency can optimise for platform performance, only you can optimise for business performance.
How Can You Find a Metric You Can Rely On?
Your Shopify dashboard is your source of truth. This is where real revenue and orders live, and you should trust this number above all others. Your second source of truth is your ad spend. A useful monthly sense check is to calculate your MER (Marketing Efficiency Ratio = Shopify revenue ÷ total ad spend).
Every month ask, "What's my MER, based on real revenue and actual spend?". Then compare that to what platforms are reporting. If your real MER is 3:1 (£3 revenue for every £1 spent), but Meta is claiming they drove £50,000 in revenue when you only spent £15,000 total on ads, something doesn't add up. But if Meta's claim roughly aligns with your overall business performance, you're in good shape.
Depending on your business and how much organic activity you invest in, your MER should tell you everything you need to know about whether your advertising is working.
Mistakes Brands Can Make Trying To Solve This
Expecting 100% accuracy If you spend £10,000 on ads and revenue is £30,000, and platforms claim £28,000, that's actually pretty good. Don't chase the last £2,000 of perfect attribution. It doesn't exist.
Switching platforms based on reporting alone If Meta's report looks "worse" than Google's, you might be tempted to cut Meta budget. But Meta carries a bigger awareness role than Google, and that’s feeding sales further down the funnel, so naturally their attributed revenue looks lower. You’re safer managing budgets based on MER and business metrics.
Ignoring email, organic, and other channels Your ads aren't the only thing driving revenue; mail, organic search, direct traffic, and word-of-mouth all matter. Check back at your new customer growth pre ads for context. If you're only looking at paid ads, you're missing a part of the picture.
What Happens When You Stop Expecting Perfect Numbers
When you accept that attribution will never be perfect you can stop agonising over the smaller detail, start thinking strategically and ask better questions:
Are we generating enough demand? (Look at Meta reach and engagement)
Are we capturing enough of that demand? (Look at Google conversion rate)
Are we being efficient with our spend? (Look at MER)
Are we growing our customer base or just repeating customers? (Look at new customer numbers)
These are the questions that matter, and they don't need perfect attribution to be answered.
When you answer them honestly, you can make faster decisions, scale what’s working and cut what isn’t… and you can do it based on what's actually happening in your business, not just what platforms are reporting.
The bottom line is simple, stop trying to make the numbers match exactly. Your Shopify dashboard shows what actually happened. Your MER shows whether it was efficient. Platform reports show which channels contributed. Together, they tell you everything you need to know about what's driving your business, without needing perfect attribution.
That's when things get clearer, and scaling becomes a lot easier.
If you’ve got a results mismatch you’d like to talk through, you can book a free 30 minute chat with us below.