Meta ads vs Google Ads: which one should you run first?

A business with one budget asks which platform to put it on, and gets an answer shaped by whoever is answering. The social agency says Meta. The search agency says Google. Both cite case studies, and both are describing clients whose situation may have nothing to do with yours.

There is a cleaner way to decide, and it takes about five minutes.

The only difference that matters

Google Ads intercepts demand that already exists. Someone types emergency plumber near me, and the entire job of the ad is to be present at that moment and be the obvious choice. You are not persuading anyone to want a plumber. You are competing to be the plumber.

Meta ads create demand that was not there thirty seconds earlier. Nobody opens Instagram intending to book a consultation. The ad has to interrupt, make a problem feel worth solving now, and offer a first step small enough to take on impulse.

Everything else — creative formats, bidding, audience controls, reporting — follows from that one distinction. So the first question is not which platform. It is:

You can check this in fifteen minutes with Google's Keyword Planner. Look at the commercial terms, not the informational ones: buy, near me, cost, hire, best, and your service plus your city. If those show meaningful monthly volume, demand exists and someone is already capturing it. If the numbers are near zero, no amount of Google Ads budget will conjure searches that nobody is performing.

When Google Ads goes first

• Urgent or unpleasant services. Emergency trades, legal problems, medical issues, pest control, locksmiths. The customer has a problem right now and is actively looking. Interrupting them on Instagram next Tuesday is worth very little.
• Established categories with real search volume. Accountants, dentists, driving schools, movers. People know the category exists and search for it by name.
• High-intent B2B where the buyer knows the software category. If prospects search payroll software for small business, be there.
• Anywhere a competitor is already bidding on your brand name. That is revenue leaking, and it is cheap to stop.

The trade is cost. You are bidding against everyone else who wants that same moment, so clicks are expensive — sometimes very expensive in legal, insurance and trades. What you get for the price is intent you did not have to manufacture. Our guide to how much to spend on Google Ads covers the arithmetic of whether those click prices can work for your margins.

When Meta goes first

• You sell something people do not know to search for. A new category, a novel service, a product that solves a problem people have quietly accepted. There is no search volume to capture because nobody has the words yet.
• The value is visible in three seconds. Before and after transformations, physical results, anything where a photograph does the arguing. Dentistry, renovation, landscaping, fitness, aesthetics.
• Impulse or discretionary purchases. Nobody searches for a weekend course they have never heard of. They see it, and they want it.
• Your search terms are ruinously expensive and your offer is strong. Sometimes the flanking route is simply cheaper.
• Local businesses whose competitors have not touched social. Attention is cheaper where nobody is bidding for it.

The trade here is creative. Meta accounts do not fail on targeting any more; the platform's targeting has been doing most of that work by itself for years. They fail because the creative is not worth stopping for. If you cannot produce three to five genuinely new concepts a month — not thirty variations of one image — Meta will be an expensive way to learn that.

What each one costs to run properly

Both platforms need enough budget to learn before they can perform, and this is where most small tests die. An account that cannot exit the learning phase is not underperforming; it is not yet running.

For Google, the floor is set by your click price and your conversion rate together. If clicks in your category cost $4 and roughly one in twenty converts, each enquiry costs about $80 in media, and you need enough monthly conversions to see whether that number is stable. A budget that produces three conversions a month tells you nothing you can act on.

For Meta, the floor is creative rather than cash. Budget matters — spreading a small amount across eight ad sets guarantees none of them learn — but the binding constraint is whether you can keep feeding it new ideas. A business that can produce one concept a quarter should not be on Meta, whatever the budget.

There is also a cost that appears on neither dashboard: attention. Two channels run adequately usually lose to one channel run well, particularly in the first six months when you are still learning what your offer does in market.

Running both, and the order to add the second

Once one channel is profitable and stable, the second is usually worth adding — not because more channels are inherently better, but because the two do different jobs and the second one changes what the first can do.

The sequence that works in most accounts:

1. Get channel one to a repeatable cost per acquisition. Repeatable means stable across two or three months, not one good month.
2. Add retargeting on the other platform before prospecting on it. If Google brings the traffic, Meta retargeting is the cheapest inventory you will ever buy: warm audiences, low competition, and it makes the search budget work harder without adding a new demand problem.
3. Only then open cold prospecting on channel two, with a budget it can actually learn on, and treat it as a separate experiment with its own success criteria.
4. Judge them together, not separately. Meta prospecting frequently improves branded search volume and direct traffic. Read in isolation, it will look like it lost.

Measuring them when the dashboards disagree

Run both and you will find the platforms collectively claim more conversions than you actually had. Both count a conversion they touched, neither knows about the other, and Meta's modelled attribution is generous by design.

Three things fix this well enough to make decisions on:

• A self-reported source question on your enquiry form. "How did you hear about us?", free text, not a dropdown. Imprecise, unbiased by any platform's interests, and the single most useful line on the form.
• Blended cost per acquisition. Total media spend divided by total genuine enquiries, every channel together. It cannot be inflated by anyone's attribution model.
• Deliberate pauses. Turn one channel off for two weeks and watch what happens to total enquiries. Crude, disliked by agencies, and more honest than any dashboard.

If you take one rule from this: never compare the two platforms using their own reported numbers. Compare what your business received in total, in months where the inputs differed.