Google Search ads vs Meta ads: how to choose

Which one to choose

Choose by how your product is bought, not by reported return. If people search for what you sell, the search auction is where the intent already is. If they do not know it exists, no keyword will find them. A catalogue holding both kinds of product needs both channels. The split is a judgement, and no dashboard produces it.

The two dashboards report a return, and they are not counting the same thing.

Three descriptions, and the third explains why this is rarely settled once for a whole account. One catalogue can hold products of both kinds, so the answer is per product, not per channel.

• People search for it by name or category. Start with the search auction, where the intent already is.
• People do not know it exists. Start with the feed-based platform, because the demand has to be made.
• Both are true of different products. Both, split by product, not by budget.

This question is badly served, and where people go for it shows that. Practitioners answer it to each other in a Reddit thread in r/googleads. Google’s AI Overview leans on that thread and not on anything a vendor published.

Most of what is written about it compares reported returns from two dashboards that are not counting the same thing. That is the one comparison that cannot settle it.

Settle the how-it-is-bought question before anything else, because the two return figures you would otherwise compare are not counting the same thing.

What differs before performance is even measured

Six differences that change the answer. Two of them are about the auction, two about the customer, and two about the counting, which is the pair that gets left out.

Google Ads Help; EasyInsightsThe two default counting rules, side by side

Defaults as published, and they are not published the same way. Google states its own; Meta’s had to be read from someone else, a year ago. The row most head-to-head comparisons never mention is also the row with the weaker source.

Google Ads on its own terms

This comparison is usually about the search side of Google Ads, not the whole platform, which also runs Display, YouTube and Demand Gen. On the search side the demand already exists and you are bidding for position in front of it, which is why the ceiling there is the number of people looking.

You cannot buy more searches than exist.

What a click costs is not a rate card. Google names six inputs to Ad Rank, of which your bid is one, and how Google Ads works is where that gets set out. For a store the format that matters most is the product listing, and it runs on your feed, not on keywords. Google Shopping ads covers that side, and Performance Max is the campaign type that increasingly runs it.

In the categories one published analysis measured, the share of clicks going to paid results rose. In the Similarweb data Aleyda Solis published in February 2026, comparing January 2025 with January 2026 across the top 5,000 US queries per category, the paid share roughly doubled in both categories measured. The sizes are below. Search Engine Land covered the same analysis and added the advertiser side, in paid clicks, not spend. Amazon up 35 percent, Walmart sixfold, Gap up 137 percent. Those are the buyers of the share that moved, which matters before treating the shift as something a small store can simply join.

One constraint is published, and you can check it before budgeting. Target ROAS needs at least 15 conversions in the past 30 days on Search and Shopping, so a small budget in an expensive auction may not reach that strategy. Others carry their own requirements.

Meta Ads on its own terms

Where Google sells the intent someone already has, Meta sells attention that was pointed somewhere else. Most people seeing the ad were not looking for your product, which is the weakness and the point at once: the addressable audience is not limited to people already searching.

Creative is the targeting.

Where the work sits on this side

The practical consequence is that the work sits in a different place. On the search side you improve a feed or a keyword list; here you improve what the ad says and shows, because the creative is what decides whether an uninterested person becomes an interested one. Our read is that creative supply binds before the bid does, because the same audience sees the same assets repeatedly. That is a claim to test, and nobody has published it. It shows up in whether performance recovers when new assets ship. If it does not, the constraint was somewhere else.

The counting is the part that trips up your comparisons. Meta publishes its standard windows itself: your click is counted for 1 day or 7 days, and a view for 1 day.

Meta’s own click and view windows

1. 1Seven days is the longest standard click window on this list. Google’s default is thirty.
2. 2The page gives the options, not which one a given account is set to. That part still has to be read in the account.

Search Engine Land put the current defaults side by side in July 2026: Meta defaults to a seven-day click window plus a one-day view. If your account still runs 28-day click, a guide dated November 2024 records that it remains available in some cases.

The same article widens the gap instead of closing it. If your Google account runs data-driven attribution, it looks back up to 90 days.

That is a modelling lookback and not your 30-day conversion window, and it is longer than both of the numbers above.

Google Ads Help, about conversion windows, read 10 September 2026What a shorter window does to the sales that fall outside it

Four rows, four published statements: the default, a worked example at seven days, the cap on the time lag report, and the rule that a change applies only going forward.

The two platforms also observe different interactions. Meta credits views and engagements as well as clicks, so the effect on the reported number is not a simple subtraction.

Which is the same problem what a good ROAS is sets out inside one platform, appearing here across two. Your own store data at least applies one rule to both, and that rule is not neutral: Shopify’s marketing reports default to last click with a 30-day lookback, giving all credit to the last channel touched, including direct visits. It sees both channels and systematically favours whichever came last. And what it counts as a conversion is your own setting before any of that, which is the question behind what a conversion rate is.

When this verdict does not hold

Our verdict is that fit with how the product is bought should decide the split. Three things can make that verdict the wrong one, and none of them is about fit at all.

Fit does not help if you cannot supply the channel that fits.

The first is creative supply. A product that fits the feed-based platform still needs a stream of new assets, because the same audience sees the same ones repeatedly. A team that can make four assets a quarter and a product that suits Meta perfectly is a worse pairing than an awkward fit on the search side, where a keyword list does not wear out. Fit picks the channel; capacity decides whether you can run it.

Two exceptions that depend on your budget

The second is the threshold. If your budget cannot produce the conversion volume a platform’s bidding strategy requires, the strategy is unavailable and fit does not change that. Google publishes 15 conversions in 30 days for Target ROAS on Search and Shopping. A perfect-fit channel you cannot run properly is not the right channel this quarter.

The third is margin and the site behind it. An auction price does not care what you sell for, and the comparison that matters is cost per order against contribution per order. That metric isolates ad spend and excludes the costs around it, so a strong return can still be a loss. If the page converts poorly, moving budget between platforms only changes which auction you lose money in, and conversion rate optimization is where that gets fixed. Neither platform is the only option either: the unpaid alternative, SEO vs PPC, is a different trade with its own arithmetic.

That is the limit of return on ad spend as a number. It reports revenue against ad cost and says nothing about what the order cost you to fulfil, so two accounts with the same return can sit on opposite sides of break-even.

Open both accounts, find the attribution setting in each, and write the two windows down on the same piece of paper. If they differ, every side-by-side return comparison you have made was comparing two different questions.

Say the two windows explain the gap: running your Google side against that is our PPC management service.