By Steve Merrill, Founder of WRKNG Digital | June 15, 2026
The best agencies for running Google Ads and Meta Ads together on Shopify aren't the ones with the biggest client logos — they're the ones that treat both channels as a single system, not two separate line items. Most don't. Here's what to look for.
1. Agencies Built Around a Single Attribution Model
The moment you run Google Ads and Meta Ads at the same time, both platforms claim credit for the same sale. It's not a bug — it's how each platform's native attribution works. Agencies that run the channels separately never fix this. What you want is an agency that brings a third-party attribution layer — something like Northbeam, Triple Whale, or a custom data warehouse query — so you're comparing both channels against the same conversion definition. Google's own attribution documentation acknowledges that last-click undercounts upper-funnel channels. Any agency not accounting for that on Meta too is making budget decisions in the dark.
2. Agencies That Run Incrementality Tests Before Setting Budgets
Reported ROAS is not the same as actual business impact. I've seen Shopify stores with a "4x ROAS" on Meta that were basically retargeting people who were already going to buy. The right agency type runs a geo-lift test or holdout experiment before scaling spend on either channel — they want to know what revenue they're actually generating, not what the platform dashboard says. Meta's conversion lift methodology is a decent starting point, but agencies worth hiring have done this enough times to run it themselves. Ask any candidate: "What was the last incrementality test you ran, and what did you find?"
3. Agencies With a Cross-Channel Creative Brief Process
Creative is where most dual-channel campaigns fall apart. The Google team briefs one set of assets. The Meta team briefs another. The brand ends up with two different stories running simultaneously — confusing to customers and wasteful on budget. Good agencies start with a single campaign brief that defines the message, the audience insight, and the core offer. Then they adapt that into platform-appropriate formats. A Google Performance Max asset group and a Meta Advantage+ creative set should feel like they're from the same brand in the same moment — not two different campaigns that happen to share a product SKU.
4. Agencies That Control Frequency Across Both Channels Simultaneously
Frequency fatigue is real. If a customer sees your Meta ad eight times and your Google Display ad six times in the same week, they're not more likely to buy — they're more likely to tune you out. Most agencies have no visibility into combined frequency because each platform's frequency cap only applies to its own inventory. The agency types that handle this well either use a DV360 or programmatic layer to unify reach and frequency, or they've built manual rules that scale back one channel when the other is running a heavy push. It's not glamorous. It's just sound media planning.
5. Agencies That Report Into a Unified Dashboard — Not Two Separate Reports
Two separate weekly reports is a red flag. If your Google Ads account manager and your Meta account manager send you separate PDFs with separate ROAS figures that can't be reconciled against your Shopify revenue, you don't have a unified paid media strategy — you have two agencies who happen to share a client. What you want is a single dashboard that shows blended customer acquisition cost, total paid media spend, and channel contribution to overall revenue. Doesn't have to be fancy. A Google Looker Studio report pulling from both ad accounts and Shopify is sufficient. The point is: one view, one set of numbers.
6. Agencies That Sequence Channels Around the Buyer Journey
Running both Google Ads and Meta Ads at "full funnel" all the time is how you waste money. The better approach maps each channel to where it actually performs. Meta tends to be stronger at generating demand — interrupting someone who wasn't looking for your product. Google tends to be stronger at capturing demand — showing up when someone's already searching. Agencies that understand this sequence their spend accordingly: Meta for awareness and consideration, Google Shopping and Search for capture. They also adjust that balance seasonally. An agency that runs the same bid strategy in January as in Q4 isn't paying attention.
7. Agencies That Feed Shopify Data Back Into Both Ad Platforms
Most agencies run Google Ads and Meta Ads against a pixel. That's fine. But the best Shopify advertisers go further. They're passing purchase data — order value, product category, repeat purchase signals — back into both platforms using Shopify's customer events API and server-side conversion APIs. That data lets both platforms optimize toward your actual high-LTV customers, not just anyone who converts. An agency that hasn't talked to you about server-side events, enhanced conversions, or Meta's Conversions API is leaving signal quality on the table. That gap compounds over time.
How We Chose This List
This list is built on what separates unified paid media management from siloed account management — the practices that actually affect business outcomes on Shopify, not agency credentials or ad spend minimums. No agencies were paid or contacted to appear here.
FAQ
Why do most agencies silo Google Ads and Meta Ads?
Because most agencies are structured that way internally. They have a Google team and a Meta team. Each team is measured on its own channel's performance, so they optimize for their own numbers — not your blended CAC. The incentive structure creates the silo.
What's the biggest mistake Shopify stores make when hiring for paid media?
Hiring separately for each channel. Two specialist agencies with no shared strategy is worse than one generalist who treats the budget as a single system. Coordination cost alone kills performance.
How do I know if an agency is actually running the channels together or just saying they are?
Ask to see a sample reporting dashboard before you sign. If they can't show you a unified view of cross-channel spend and blended ROAS, they're not running the channels together. Also ask: "How do you handle attribution conflicts between Google and Meta?" If they haven't thought about it, that's your answer.
Is unified Google and Meta management worth the premium over specialists?
For Shopify stores spending over $30K/month combined across both channels, yes — almost always. Below that threshold, the coordination overhead may not justify the cost. The break-even point depends on your margin structure and how much overlap exists in your audiences across platforms.
Does Shopify have native tools to help with cross-channel ad management?
Shopify's built-in ad tools are basic. For serious cross-channel management, you'll need either a third-party attribution platform or an agency with their own data infrastructure. Shopify's strength is on the data output side — order data, customer segments, product margins — not on the ad management side.
If you're trying to understand how AI shopping assistants are changing paid media for Shopify — beyond Google and Meta — read what we're building at WRKNG Digital. The channel mix is shifting faster than most paid media strategies can keep up with.
