Facebook Ads vs Google Ads for Ecommerce (2026)

The choice turns on one fact about your product: do buyers search for it? Google’s Search and Shopping ads answer a search, so they work when demand already exists and you want to be in front of it. Meta’s ads reach people while they scroll, so they work when you need to create demand for something people do not yet know to ask for. If you run both, measuring them fairly matters as much as the choice.

Platform details below were read on Google’s and Meta’s own help pages on 2 Oct 2026.

What is the difference between Facebook ads and Google ads?

The difference is intent at the moment the ad shows.

• Google Search campaigns “show ads to people actively searching online for your products and services”, targeted by the keywords you choose (Google Ads Help: Search campaigns).
• Google Shopping ads show a product photo, title, price and store name, and use your Merchant Center product data, not keywords, to decide where to show (Google Ads Help: Shopping ads).
• Facebook and Instagram ads go to people Meta’s delivery system selects, searching or not. With Advantage+ audience, Meta’s AI finds the audience using signals such as past conversions, Meta pixel data and interactions with previous ads (Meta: About Advantage+ audience).

Each side also reaches into the other’s territory. Google’s Performance Max campaigns run across YouTube, Display, Search, Discover, Gmail and Maps from one campaign (Google Ads Help: Performance Max), and Demand Gen campaigns run across YouTube, Discover, Gmail, Maps and the Display Network (Google Ads Help: Demand Gen). So “Google equals search” is only true of Search and Shopping.

How do Facebook ads and Google ads compare for an online store?

Platform details as of 2 Oct 2026, from each platform’s own help pages.

Sources for the Meta column: About managing ad volume, Advantage+ catalog ad requirements and Differences between Conversion Lift and other reporting.

Which should a store start with?

Start where your demand already is, and answer these in order:

1. Do people search for your product type? Type the words a buyer would use into Google. If shoppers are already searching for “linen bedsheets” or “trail running shoes”, Search and Shopping put you in that moment.
2. Is your product new or hard to name? A new invention, a niche gift or a brand-led product has few searches. Meta can show it to people who have never heard of it.
3. Can your creative carry the sale? Meta runs on images and video you supply, and its advice is fewer ads per ad set, each with varied assets.
4. Is your product feed clean? Shopping ads are built from product data, so price, title and image quality in Merchant Center decide what the shopper sees.
5. Can you fund the learning? On Meta, an ad set usually exits learning after about 50 results in a week (Meta: About the learning phase). If 50 purchases a week is out of reach, plan for a smaller number of ad sets.

If the answers split, run a small test on each and compare the orders added, not the platform dashboards.

How do I compare results when I run both?

Do not add up the two dashboards. Each platform credits itself with conversions under its own attribution rules, so a customer who saw a Facebook ad and later clicked a Google Shopping ad can be counted by both. Meta’s Ads Manager, for example, credits purchases to clicks or views within a 1, 7 or 28 day window.

Compare them on what your store records instead: total orders and revenue, divided by total ad spend, and the change in orders when one channel’s spend changes. The method for a fair side-by-side is in how do I compare Meta against my other paid channels?, and the cost metric to track across both is in how do I calculate blended CAC across channels? For Meta’s side of measurement, see the ROAS and attribution hub.

Can software help?

Bach.ai (by Wittelsbach) connects to a Meta ad account, audits it daily, finds revenue leaks with an estimated revenue impact, and proposes fixes. On every plan, Bach.ai applies a change on Meta only after you approve it. Google Ads is audit and insights only: Bach.ai makes no changes on Google Ads, so changes there stay with you or another tool.

FAQ

Is Google Ads or Facebook ads cheaper for ecommerce?

There is no reliable public figure that settles it for every store, because costs depend on category, competition and your conversion rate. Compare your own cost per order on each channel over the same weeks, counted from your store’s orders rather than each platform’s reported conversions.

Can I run Google Shopping ads without Merchant Center?

No. Google says Shopping ads use your existing Merchant Center product data, not keywords, to decide how and where to show, and you manage them through Shopping or Performance Max campaigns. You need a feed with accurate titles, prices and images before Shopping ads can show your products.

Do I need the Meta pixel to run Facebook ads?

You can run ads without it, but Meta’s Advantage+ audience uses pixel data and past conversions to find buyers, and Advantage+ catalog ads need a pixel or app connected to your catalog. Without the pixel or Conversions API, Meta has little purchase data to optimize toward.

Should I split my budget between Facebook and Google?

Only if each channel can fund enough results to learn and you can measure what each adds. A small budget split across both can leave neither with enough data. Start with the channel that fits your demand, then add the other once the first is profitable on your store’s numbers.

Sources

Sources: Google Ads Help, Search campaigns, Shopping ads, Performance Max and Demand Gen; Meta Business Help Center, About Advantage+ audience, About the learning phase, About managing ad volume, Advantage+ catalog ad requirements and Differences between Conversion Lift and other reporting (checked 2 Oct 2026).