Facebook Ads vs. Google Ads: Where Should Ecommerce Brands Spend?

Most ecommerce brands face this question early: should I invest in Facebook ads or Google ads? And here's what actually works in the real world - you probably need both. But not equally, and definitely not in the same way.

The reason comes down to one fundamental difference: Google captures customers who are actively hunting for a solution. Facebook puts your product in front of people who didn't know they wanted it yet. Both have their place. The question is which one matters more for your business right now.

How Facebook Ads and Google Ads Work

There's a clean distinction between these platforms that matters more than anything else.

Google Ads: Demand Capture

Google works because people arrive with a problem and a search bar. Someone types "best running shoes under $100" or "sustainable coffee table" into Google, and you get to bid on that moment.

This is the easy sell. The customer has already done the mental work. They know they want something. They're comparing options. Your job is just being there with a competitive offer when they search.

For ecommerce specifically, two ad types drive most of the revenue. Search campaigns are text ads on the search results page. Shopping campaigns are the ones with product images, prices, and review ratings right there in the results. Shopping ads are especially brutal for driving sales on obvious purchase intent searches.

Facebook Ads: Demand Generation

Facebook works differently. Nobody logs in to Facebook to buy shoes. They're scrolling past their friend's vacation photos, watching a video, seeing what's trending. Facebook uses everything it knows about them - age, interests, what they follow, what they've clicked, where they live - to show ads to people who might want what you're selling.

This approach actually excels at something Google can't do: introducing customers to products they didn't know existed. A sustainable clothing brand doesn't need someone to search for "sustainable clothing." Facebook finds the person interested in eco-fashion and vegan products and puts the brand right in front of them.

The ads show up on Instagram, Messenger, and across Meta's whole app family. You've got image ads, video ads, carousel ads (swipeable product collections), and collection ads that work like little storefronts inside the app.

Audience Targeting Differences

How each platform lets you reach people is where the real strategy diverges.

Google Ads Targeting

Google focuses on intent. What are people actually looking for?

Keywords: The literal words people search
Search modifiers: "Near me," "buy," "cheap," location-specific searches
Audience lists: People who visited your website before
Similar audiences: New people who match your best customers
Demographics: Age, gender, income brackets (limited options though)

Google's targeting is straightforward but not granular. You're essentially bidding on what people want. You can't target by interests or hobbies the way Facebook can. You're working with intent signals, not lifestyle data.

Facebook Ads Targeting

Facebook is the opposite. It's granular. Almost creepily so.

Demographics: Age, gender, location, education, job title
Interests: Hobbies, pages people follow, activities they engage with
Behaviors: Purchase history, phone type they use, internet connection type
Custom audiences: Your own customer list or website visitors
Lookalike audiences: People similar to your existing customers
Life events: Birthdays, anniversaries, recent moves, new jobs

This depth of data means you can build very specific audience segments. If you sell high-end running shoes, you can target 25-45 year old men in tech who follow fitness brands and have purchased shoes online in the last 30 days. With Facebook, you're essentially describing your ideal customer and Meta finds them. Google doesn't do that.

Ad Format Differences

The creative formats available on each platform shape what kind of selling story you can tell.

Google Ads Formats

Google's formats are utilitarian. They're built for comparison shopping, not storytelling.

Search ads: Headline, description line, URL. Text only.
Shopping ads: Product image, title, price, rating. This format is pure ecommerce.
Performance Max: Google's AI system that takes your assets and automatically adapts them across Google properties

Google Shopping ads are gold for ecommerce. You get the image, you get the price, you get reviews right there in the search results. When someone's ready to buy, these ads are incredibly effective.

Facebook Ads Formats

Facebook is visual-first. Every format is designed to stop a scroll.

Image ads: A single product or lifestyle photo
Video ads: Short clips or longer content
Carousel ads: Multiple products the user can swipe through
Collection ads: An immersive product catalog experience
Reels ads: Short-form video ads in Instagram Reels
Stories ads: Full-screen mobile ads

These formats let you tell a brand story. Show how the product works. Demonstrate the feeling someone gets from using it. You're not just competing for attention - you're trying to make someone want something they didn't know they wanted.

Cost Comparisons: CPC, CPM, and CPA by Industry

Budget expectations vary significantly. Understanding benchmarks prevents surprises.

Cost Per Click (CPC)

CPC is simple: how much you pay per click.

Google Ads: Varies wildly by industry and keyword. Competitive keywords (medical, finance, real estate) run expensive. For ecommerce, you're typically looking at $0.50-$5.00 per click on search ads. But "buy running shoes" is going to cost more than "running shoe reviews" because everyone's bidding on the intent. B2B keywords often exceed $20 per click.

Facebook Ads: Usually cheaper than Google. Ecommerce typically runs $0.50-$2.50 per click. Since Facebook doesn't use keyword auctions, pricing is more stable and predictable. You're not competing with every other brand selling the same thing.

Cost Per Thousand Impressions (CPM)

CPM measures visibility costs. Sometimes you care about reach more than clicks.

Google Ads: Typically $1-$10 per thousand impressions, though competitive audiences or seasonal spikes push it higher.

Facebook Ads: Comparable to Google usually. $2-$8 per thousand impressions depending on audience quality and time of year. Holiday seasons get expensive.

Cost Per Acquisition (CPA)

This is the metric that actually matters for ecommerce. How much does it cost to get one customer to buy?

Google Ads ecommerce benchmarks: Expect CPA between $15-$50 for most ecommerce categories. Commodity products (low margin, high volume) have lower CPAs. Luxury goods and niche products cost more to acquire because fewer people are searching for them.

Facebook Ads ecommerce benchmarks: Usually $10-$40, and often lower than Google. This is because Facebook catches people earlier in their research. They haven't fully decided they want to buy yet, so you're not competing against other brands in a high-intent auction.

These numbers shift based on your product category, how much competition exists, how good your landing page converts, and whether you're actually optimizing your funnel. A perfect Facebook funnel will beat a poorly optimized Google one every time.

When to Prioritize Facebook Ads

Facebook crushes it in specific scenarios.

New Brands Building Awareness

You're a new brand. Nobody's searching for you. Nobody knows you exist. Google won't help much because there's no search volume for your brand name. Facebook lets you reach people interested in what you're selling based on interests and behaviors, not search queries. You're not competing with established brands who dominate branded search.

Example: A direct-to-consumer sustainable clothing brand. You can target people interested in eco-fashion, vegan products, ethical manufacturing, and follow sustainability accounts. These people haven't searched for you yet, but they're exactly who'd buy from you.

Visual and Impulse-Driven Products

Fashion. Home decor. Beauty products. These categories have visual appeal that jumps off the screen. Facebook's visual formats - especially video and carousel ads - showcase these products way better than text ads ever could.

Plus, impulse purchases happen on Facebook. Someone's scrolling, they see a product that catches their eye, and they buy it. Google doesn't work that way. Google shoppers are already decided. They're comparison shopping.

Building Community and Brand Loyalty

Facebook's retargeting lets you stay in front of existing customers with engaging content. Carousel ads showcasing your full range. Video content that builds emotional connection. You're not acquiring new customers here - you're turning first-time buyers into repeat customers.

Lower-Cost Customer Acquisition at Scale

If you've got healthy margins and have figured out how to convert visitors into customers, Facebook often delivers lower acquisition costs at significant scale. You can test more volume without your CPA exploding the way it does on Google.

When to Prioritize Google Ads

Google dominates other situations.

High-Intent Search Queries

When someone searches "best ergonomic office chair for back pain," they're ready to buy. They know what they want. They're comparing options. Google Ads wins that moment. Your competitor might have a more beautiful Facebook ad, but the person searching has already decided this is what they need.

Established product categories where customers know what they're looking for? Google owns these moments.

Your category gets real monthly search volume. "Coffee grinder," "running shoes," "office desk" - these get searched thousands of times per month. Google Ads puts you in front of every single one of those searches. You're essentially buying visibility in the moments when people are ready to purchase.

Established Brands and Higher-Margin Products

If you're an established brand, people are actively searching for your name. "YETI cooler" gets searched. "Patagonia fleece" gets searched. That search volume represents customers who either want you specifically or are considering you. Google captures that.

Higher-margin products can absorb higher Google CPCs. If your product has a 70% margin, paying $10 per click to get a customer is fine. Low-margin commodity products? Google's costs kill your profitability.

Retargeting High-Intent Audiences

Google's audience lists are perfect for retargeting website visitors. Someone visited your product page, didn't buy, but showed serious interest. Google lets you reach them again with targeted messaging. These are your best conversion opportunities.

How to Allocate Budget Between Both Platforms

There's no universal split. It depends on your stage.

For New Ecommerce Brands

Start 60/40 or 70/30 toward Facebook. Use Facebook to build initial brand awareness and your first customer list. Once you've got some traction and people are actually searching for you by name, layer in Google to capture that demand. You're using Facebook to create customers, then Google to amplify what's already working.

For Established Brands

Move toward 50/50 or adjust based on what's working for you. Established brands have significant branded search volume, so Google becomes more valuable. Facebook stays critical for scaling customer acquisition beyond your existing customer base.

By Product Category

Fashion and home goods: 70% Facebook, 30% Google (visual selling matters)
Electronics and appliances: 50/50 (both high-intent search and visual appeal)
B2B and high-ticket items: 20% Facebook, 80% Google (intent drives these purchases)
Local services: 30% Facebook, 70% Google (location intent is huge)

The real answer: test different splits, measure which platform delivers better ROAS for your specific business, and shift money where it's working.

Measuring Cross-Platform Performance

Accurate measurement across both platforms is hard but essential.

Conversion Tracking Setup

Install the Facebook Pixel on your website. Set up Google Ads conversion tracking. Track actual sales, not just website visits. Both platforms let you track purchases, add-to-carts, email signups, whatever matters for your business.

Attribution Is Messy

Here's where it gets frustrating. Facebook and Google don't agree on credit. Facebook uses 28-day click attribution by default. Google uses 30-day click attribution or 7-day view attribution for search. Both platforms might claim credit for the same customer.

This is why unified analytics matter. Use ORCA's cross-platform analytics to see what's actually happening across Google Ads and Facebook Ads in one dashboard. You get a complete picture of which platform drives customers who stick around, which customers are highest quality, where your real incremental revenue comes from.

Key Metrics to Track

Track these numbers regularly:

ROAS: Revenue divided by what you spent (the one metric that tells you if this is profitable)
CPA: Cost per customer (how much you paid to acquire them)
Customer Lifetime Value: How much revenue that customer generates over time
Conversion Rate: Percentage of visitors who actually buy
Click-Through Rate: Percentage of ad impressions that get clicked

Incremental Impact

Run an actual experiment. Pause one platform for two weeks while running the other. Measure what happened. Did revenue drop proportionally, slightly, or not at all? This tells you whether a platform is driving new customers or just converting people who would have found you anyway. That difference determines whether the platform is worth the spend.

Building a Full-Funnel Strategy Using Both Platforms

The ecommerce brands actually winning use both Facebook and Google strategically across the entire customer journey.

Awareness Stage: Primarily Facebook

Someone's never heard of your brand. Use Facebook to introduce it. Create video content that tells your brand story. Demonstrate why your product matters. Solve a problem your customer has. Target broad audiences interested in your category and lookalike audiences based on your best customers.

Measure success by reach, impressions, and engagement. Your first-time click-through rate might be low because people aren't ready to buy yet. That's fine. You're building brand awareness.

Consideration Stage: Both Platforms

They know about you now. They're researching. Use Facebook carousel ads to showcase your product range and customer testimonials. Show different angles or use cases. Layer in Google Ads targeting keywords related to your category and brand. People are searching to compare you against competitors or learn more about your solution.

Decision Stage: Primarily Google

They're ready. Someone searches your brand name or is comparing options. Google Ads dominates here. Make sure your ad copy is tight. Landing pages are focused. Show shopping ads with prices and reviews. Reduce friction - make buying easy.

Post-Purchase: Both Platforms

The customer bought. Now what? Retarget them on both platforms with loyalty offers, complementary products, and brand content that encourages them to buy again. This isn't about new customer acquisition. It's about maximizing lifetime value.

Making the Choice: Key Takeaways

You're not choosing between Facebook and Google. You're using both, but strategically.

Start with Facebook if you're new. You've got a visual product and nobody knows your brand exists yet. Facebook's demand generation approach reaches people who might want you but haven't searched for you.

Add Google once you have momentum. You've optimized your funnel. You know your unit economics. People are starting to search for you by name. Google amplifies demand that already exists.

Measure what actually matters. Unified analytics across both platforms show true ROI. Not estimated, not claimed by the platform. Real incremental revenue.

Follow the performance data. Don't allocate budget by gut feel or arbitrary percentages. Measure ROAS and shift spending toward the platform generating the best return for your business.

Build the funnel properly. Use Facebook for awareness and consideration. Use Google for decision and retention. Don't fight against what each platform does best.

The brands winning at digital advertising aren't debating between Facebook and Google. They're mastering both platforms and using them as complementary parts of a larger strategy that moves customers from first awareness to repeat purchase.

Want to see your cross-platform advertising performance clearly? ORCA connects your Google Ads and Facebook Ads data with actual customer data to show which ads drive real revenue growth and which customers stick around. See the true ROI across both platforms in one unified dashboard.