This is Part 3 of the Google Ads vs Meta Ads trilogy. Part 1 covered the comparison. Part 2 covered when to use which. This part is for businesses already spending on both — or ready to — who want a system that makes the two platforms work together instead of competing against each other.
In This Article
Why Running Both Without a System Fails
Most businesses that run both platforms do it like this: they set up Meta campaigns for awareness, Google campaigns for conversions, check both dashboards weekly, and wonder why the combined ROAS doesn't add up to what either platform promises individually.
The problems are predictable. Meta claims a conversion that Google also claimed. Budget on one platform cannibalises the other. The same customer sees the same message on both platforms at the same time. Creative built for one context gets copy-pasted to the other and underperforms. There's no clear answer to "which platform is actually working?"
A system solves all of this. It defines which platform owns which part of the funnel, how budget flows between them, how to measure combined performance honestly, and what to do when the numbers don't agree.
Assigning Funnel Roles to Each Platform
The single most important step in building a two-platform system is deciding which platform owns which funnel stage — and enforcing that boundary. Without it, both platforms end up competing for the same conversion credit.
🔵 Google Ads — Owns
- High-intent search capture (branded + non-branded)
- Decision-stage keywords ("buy", "price", "near me", "best")
- Shopping campaigns for product catalogue
- YouTube for mid-funnel video (consideration)
- Google Display for cheap retargeting coverage
The discipline is in the boundary. Don't run Google Display to cold audiences — that's Meta's job. Don't run Meta prospecting campaigns with the same message as your Google Search ads — the mindsets are completely different. Each platform should feel native to its own context.
When roles are assigned correctly, the platforms amplify each other. Meta builds awareness → people search your brand on Google → branded search converts at high rate and low cost → you reinvest savings into more Meta prospecting. This compounding loop is why dual-platform businesses at scale consistently outperform single-platform businesses at the same total spend.
Budget Split Ratios by Business Type
There is no universal split. These are starting ratios based on business category — adjust based on actual CPA data from your campaigns over 60–90 days.
Attribution — Why Both Platforms Are Lying to You
When you run both platforms, every conversion gets claimed by both. This is not a bug — it's how attribution windows work. Understanding it is non-negotiable for anyone spending serious money across both channels.
| Attribution Setting | Meta Default | Recommended | Impact |
|---|---|---|---|
| Click window | 7-day click | 1-day click | 7-day window inflates ROAS by attributing purchases that happened days after the click |
| View-through | 1-day view (on by default) | Off | Counts conversions where the customer never clicked your ad — pure inflation |
| Google attribution | — | Last click (Search) | Data-driven attribution on Google can over-credit upper-funnel touchpoints |
| Cross-platform | Each claims full credit | Use MER only | Double-counting makes combined ROAS meaningless without your own revenue data |
Never use platform-reported ROAS to evaluate combined performance. Use MER = total revenue from Shopify or WooCommerce ÷ total ad spend across all platforms. This is the only attribution-neutral metric. Check it weekly. If MER is above your target, the system is working. If it's falling, investigate — don't trust either platform's dashboard to tell you which one is the problem.
4 Overlap Problems and How to Fix Them
These are the most common ways dual-platform systems break down in practice:
A customer sees your Meta prospecting ad on Monday, then sees the same creative as a Google Display remarketing ad on Wednesday. The message isn't adapted for the platform context and frequency is annoying.
Exclude your Google remarketing audiences from Meta prospecting. Use Meta for warm retargeting (website visitors, video viewers) with a different message than your prospecting campaigns. Reserve Google Display for people who searched your brand but didn't convert — a narrower, more intentional audience.
Your Shopify shows ₹1L in revenue. Meta reports ₹1.2L ROAS revenue. Google reports ₹80,000. Combined platform ROAS revenue: ₹2L. This is standard double-counting — not fraud, just overlapping attribution windows.
Switch Meta to 1-day click, view-through off. Use last-click on Google Search. And most importantly — ignore both dashboards for business decisions. Track MER from your own data source only.
Meta builds awareness of your brand → customer searches your brand on Google → you pay for a branded keyword click that you would have gotten organically anyway. Meta's awareness spend generates Google branded search — and then Google charges you for that traffic.
Keep branded search campaigns but monitor branded CPC closely. As Meta spend increases, branded search volume should increase proportionally. If branded CPC is rising with no corresponding increase in non-branded performance, consider pausing branded search and relying on organic rankings for brand queries.
Copy-pasting the same image and headline from Meta into Google Display, or repurposing a Google Search headline into a Meta feed ad. Platform contexts are fundamentally different — a passive scroller needs a visual hook; an active searcher needs a direct match to their query.
Build platform-native creative from the start. Meta: short-form video or high-quality image with a visual hook in the first 2 seconds, minimal text, benefit-led. Google Search: headline that mirrors the search query, clear benefit, strong CTA. Google Display: clean brand creative, single clear message, recognisable visual. Never cross-post without adapting.
Creative Strategy for Each Platform
Creative is where most dual-platform systems break down silently. Same budget, same targeting, wrong creative — and one platform consistently underperforms.
| Element | Meta Ads | Google Search | Google Display |
|---|---|---|---|
| Hook requirement | First 2 seconds — visual stop | Headline keyword match | Brand recognition in 1 glance |
| Text amount | Minimal — let visual carry | Every character matters | Single short message |
| Format | Video (Reels), single image, carousel | Responsive search ads | Responsive display ads |
| Tone | Conversational, discovery-driven | Direct, intent-matching | Clean, branded |
| CTA | Soft — "Learn more", "Shop now" | Hard — "Get quote", "Book now" | Medium — "Find out more" |
| Refresh frequency | Every 3–4 weeks (fatigue) | Test quarterly | Test monthly |
Weekly Management Rhythm
A two-platform system needs a consistent management cadence. Ad hoc optimisation — checking dashboards when something feels off — leads to reactive decisions and wasted budget.
When to Rebalance the Budget Split
Rebalance only after 60–90 days of data, not based on weekly fluctuations. The trigger to shift budget: one platform's CPA is consistently 30%+ higher than the other over a full month. Don't chase weekly ROAS swings — both platforms have natural variance that smooths out over a month.
Want Someone to Build and Manage This System for You?
ENZO Digital builds and manages full-funnel paid media systems across Meta and Google Ads for Indian businesses — including budget strategy, creative production, attribution setup, and ongoing optimisation.
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