Facebook Ads vs Google Ads for Ecommerce: How They Work Together

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The facebook ads vs google ads for ecommerce debate often treats them as rivals. In practice they sit at different points of the buying journey. Meta puts your product in front of people who did not know it existed. Google catches people who are already typing a product or brand name into a search bar.

This guide explains how each works for an online store, where Shopping and Performance Max fit, how creative differs, why the two platforms double-count sales, and how to budget for both without fooling yourself.

Are Facebook ads or Google ads better for ecommerce?

They do different jobs. Facebook and Instagram ads create demand by showing products to people who were not searching. Google Shopping and search capture demand from people already looking. Most growing DTC brands use Meta as the main acquisition engine and Google to capture branded and product searches, then judge both on blended results.

Facebook ads vs Google ads at a glance

A general comparison of how the platforms behave for a typical Shopify brand. It is not a statistic about either channel.

Factor	Meta (Facebook and Instagram)	Google (Search, Shopping, PMax)
Primary role	Demand creation	Demand capture
How people find you	Ads in feeds, Stories and Reels	Search results, Shopping listings, YouTube, Display
Main lever	Creative and offer	Product feed, keywords, bids and search volume
Scale ceiling	Grows with creative and budget	Limited by how many people search
Creative needs	High volume of new video and static ads	Clean feed images and titles, some video for PMax
Best for	New products, new categories, impulse purchases	Known products, branded search, high-intent buyers
Attribution risk	Undercounts sales that finish on search	Claims credit for demand Meta created

Demand creation vs demand capture

Meta is a discovery platform. It finds likely buyers from behaviour and purchase signals and shows them an ad they did not ask for. If the creative and offer are strong, Meta can scale a brand that nobody is searching for yet. That is why most DTC growth stories start on Meta.

Google works the other way. Someone searches for a product, a problem or your brand name, and Google shows ads that match. Intent is high, so conversion rates on branded and product searches are often strong, but volume is capped by how many people search. If nobody has heard of your product, there is little search demand to capture.

The two feed each other. Meta ads make people curious, many of them later search your brand or product name, and Google catches that search. Cut Meta and branded search often falls a few weeks later.

Google Shopping and Performance Max for online stores

For ecommerce, the core Google formats are Shopping ads, which show product images, prices and your store name, and Performance Max, which uses your product feed and assets across Search, Shopping, YouTube, Display and Gmail in one campaign.

Your product feed is the foundation: accurate titles, clean images, correct prices and stock status matter more than clever bids.
Separate branded search from non-branded so Performance Max does not take credit for people who would have found you anyway.
Feed titles should lead with the words people search, such as product type, key feature and size.
Give PMax real creative assets, including short videos, or Google will generate weaker ones automatically.
Review search terms and product performance regularly and exclude what does not pay back.

Creative: where the work goes

On Meta, creative is the main lever. The algorithm handles targeting; your job is to give it enough new angles, hooks and formats to find buyers. That is why we produce 30 to 50+ new ad creatives and angles a month for partner brands.

On Google, the feed does most of the work in Shopping, and copy matters more than visuals in Search. Performance Max needs images, headlines and video, but the volume required is far lower than on Meta. The skill shifts from creative production to feed management, keyword control and bid strategy.

That difference matters when you staff the channels. A great Meta buyer is not automatically a great Google Shopping manager, and the reverse is also true.

Attribution overlap: why the numbers add up to more than 100%

Each platform reports conversions using its own rules. A customer might see a Meta ad on Monday, search your brand on Thursday and click a Shopping ad before buying. Meta counts that sale under its attribution window. Google counts it too. Add the two dashboards together and you have more revenue than Shopify recorded.

That is why the most reliable check is blended: total store revenue divided by total ad spend across all channels (MER), and new customers acquired against total spend. Use platform ROAS to optimize inside each platform, and blended numbers to decide how much to give each one.

How to budget for both

A practical approach for most DTC brands is to treat Meta as the growth budget and Google as the capture budget. Fund branded search and core Shopping campaigns so you do not lose high-intent buyers to competitors, then put most incremental spend where new demand is created.

Start Google with branded search and Shopping on your best sellers.
Keep the majority of growth spend on Meta while it scales profitably.
Increase Google spend when non-branded search and Shopping hold their own on blended results.
Test a pause or reduction on one channel and watch total revenue, not just its dashboard.
Check your break-even ROAS so both channels have a clear profitability floor.

Which to prioritise for your product

The right balance depends heavily on whether people already search for what you sell. A quick way to check is to look at search suggestions and Google Shopping results for your product type. If you see plenty of competing listings, there is demand to capture. If you see almost nothing, you will have to create that demand first, and that is a job for Meta.

New or unusual products that solve a problem people do not search for: lead with Meta.
Everyday categories with clear search terms, such as replacement parts or staples: Google Shopping can carry more weight early.
Impulse and visual products such as fashion, beauty and gadgets: Meta first, Google to catch the brand searches it creates.
Established brands with strong name recognition: protect branded search on Google and use Meta to keep growing new customer volume.

Proof from real accounts

$137,620 Month at 3.89x ROAS: Supplement brand on Meta (see the proof)
$54K In 7 days at 4.43x ROAS: Jewelry brand using manual bidding campaigns (see the proof)
30 to 50+ New ad creatives a month: Produced for partner brands (see the proof)

Frequently asked questions

Should a new ecommerce store start with Facebook or Google ads?

If your product is new and few people search for it, start with Facebook and Instagram ads, because they create demand. If people already search for your product type, Google Shopping can bring high-intent buyers quickly. Many brands run a small branded search and Shopping campaign alongside Meta from early on.

Is Google Shopping better than Performance Max?

Neither is always better. Standard Shopping gives more control over products and bids, while Performance Max reaches more Google placements with less manual work. Many stores use both, with PMax for broad reach and Shopping or search for tighter control. The quality of your product feed matters more than the campaign type.

Why does my Facebook and Google revenue add up to more than Shopify?

Both platforms claim credit for the same orders. A customer who saw a Meta ad and later clicked a Google Shopping ad can be counted by both. Use each platform's numbers to optimize within it, and use blended MER, total revenue divided by total ad spend, to judge overall performance.

How much should I spend on Google vs Facebook ads?

There is no fixed ratio. A common starting point is to fully fund branded search and core Shopping so you capture existing demand, then put most growth spend on Meta. Shift budget toward Google as non-branded campaigns prove profitable on blended results. Your margins and search volume decide the split.

Do Facebook ads help Google ads perform better?

Often, yes. Meta ads make people aware of your brand, and some of them later search your brand or product name, which shows up as Google branded search and Shopping conversions. That is why pausing Meta can reduce Google results a few weeks later, even though Google reports no direct link.

Get a clear view of what each channel really drives

In a Brand Growth Audit we look at your Meta and Google accounts together, check tracking, and show you how blended results compare with what each platform reports. Book a Brand Growth Audit.