Most comparisons of Meta Ads and Google Ads focus on cost or audience size. Those matter — but they miss the fundamental difference that should drive your decision.
Google Ads captures demand. Meta Ads creates it.
When someone types "buy running shoes online" into Google, they're ready to purchase. Google puts your ad in front of them at exactly that moment. That's demand capture.
When someone is scrolling Instagram and sees an ad for running shoes, they weren't looking for them. But the ad creates awareness — and potentially desire. That's demand creation.
For e-commerce, both are valuable. But they serve different stages of the customer journey, require different creative approaches, and perform differently depending on what you're selling.
Google Shopping is the primary format for most e-commerce advertisers. It shows product images, prices, and store names directly in search results — before users even click. Google pulls this data from your product feed in Google Merchant Center.
Beyond Shopping, Search campaigns let you target people searching for specific products or categories using keywords.
Where Google Ads performs best:
Where Google Ads struggles:
Meta Ads (Facebook and Instagram) are interest and behaviour-based. You define your audience — demographics, interests, behaviours, custom audiences — and Meta shows your ads to those people as they browse their feeds, stories, and reels.
Advantage+ Shopping Campaigns (Meta's equivalent of Performance Max) let you upload your product catalogue and let Meta's algorithm find buyers automatically across placements.
Where Meta Ads performs best:
Where Meta Ads struggles:
Neither platform is universally cheaper. Costs depend on your category, audience, creative quality, and competition.
|
Metric |
Google Ads |
Meta Ads |
|---|---|---|
|
Average CPC |
$1–$6 (Shopping), $2–$10 (Search) |
$0.50–$2.50 |
|
Average CPM |
$2–$8 (Display) |
$7–$15 |
|
Average ROAS |
200–600% (established stores) |
150–400% |
|
Creative requirement |
Low (product feed + headlines) |
High (images, video, copy) |
|
Learning period |
1–2 weeks |
1–2 weeks |
|
Minimum budget |
$15–20/day for meaningful data |
$20–30/day for meaningful data |
These are directional figures — your actual results will vary significantly based on category and execution.
The biggest practical difference between the two platforms is the intent of the person seeing your ad.
Google: High intent. The person typed a search query — they're actively looking for something. This means higher conversion rates but also higher competition and costs.
Meta: Low to medium intent. The person was scrolling their feed — your ad needs to stop them, create desire, and convert them. This means you need stronger creative and a compelling offer, but your audience can be much larger.
For products with clear search demand, Google is usually more efficient at converting. For products that need to be discovered or seen to be wanted, Meta usually wins.
If you're choosing where to start with a limited budget, here's a practical guide:
Start with Google if:
Start with Meta if:
Start with both if:
For scaling e-commerce stores, the most effective approach is using both platforms for different roles in the customer journey:
Top of funnel (Awareness): Meta Ads — video content, broad interest targeting, introducing your product to new audiences
Middle of funnel (Consideration): Meta retargeting — show ads to people who watched 50%+ of your video or visited your product pages
Bottom of funnel (Purchase): Google Shopping — capture high-intent searches from people who are now researching to buy
Post-purchase (Retention): Meta — loyalty offers, new product announcements, referral campaigns to existing customers
Google Ads tracking is more reliable — conversion data flows directly from your website via the Google tag or Google Analytics integration. Attribution is still imperfect but relatively clean.
Meta Ads tracking was significantly affected by Apple's iOS 14.5 update in 2021, which required users to opt in to tracking. This reduced the accuracy of pixel-based attribution for iOS users. Meta's Conversions API (CAPI) partially restores this by sending data server-side rather than browser-side — worth setting up if you're spending seriously on Meta.
Expect Meta to over-report and under-report conversions at different times depending on your audience's device mix.
Is Google Ads or Meta Ads better for a new e-commerce store? For most new stores, Meta Ads is easier to start with because you can test creative quickly at lower CPCs and the targeting doesn't rely on existing search volume. Google Shopping requires a fully set-up Merchant Center feed and works best when you already have some product and keyword data. That said, if your product has clear search demand, Google Shopping can generate profitable sales from day one.
What ROAS should I expect from Google Shopping? A well-optimised Google Shopping campaign typically achieves 300–500% ROAS for established e-commerce stores. New campaigns often start lower (150–250%) while the algorithm learns. Aim for at least 200% before scaling spend.
Do I need a large budget to run both platforms? You can run meaningful tests on each platform from around $500–1,000/month per channel. Below this, the algorithms don't have enough data to optimise. If your total budget is under $2,000/month, focus on one platform first.
How does the iOS 14 update affect Meta Ads for e-commerce? iOS 14 reduced tracking accuracy for iPhone users who opt out of tracking (approximately 60–70% of iOS users). This means Meta reports fewer conversions than actually occur. The solution is setting up Meta's Conversions API alongside the pixel, using a 1-day click attribution window, and tracking revenue independently in your e-commerce platform.
Can I use the same creative for both Google and Meta? Not effectively. Google Shopping creative is largely automated from your product feed — price, image, title. Meta creative needs to be thumb-stopping, benefit-led, and formatted for vertical (9:16) mobile viewing. Building separate creative assets for each platform is almost always worth the effort.
Related reading: Facebook Ads vs Google Ads: Which is Better? | Beginner Guide to Google Ads | How to Advertise on Facebook | Types of Google Ads Campaigns