Google Ads vs Meta Ads: which should a small business prioritise first?

Start with Google Ads if people are already searching for what you sell. Start with Meta if they are not.

That is the whole decision, and it is not really about which platform is better. Google Search puts you in front of someone who has already decided they want the thing and is choosing where to buy it. Meta puts you in front of someone who was not thinking about it at all. Both work. They just do different jobs, and only one of them works when you have not yet proved anyone wants what you are selling.

For most small UK businesses, search demand already exists, which is why Google is the more common starting point. But it is worth actually checking rather than assuming.

How do I know if there is search demand for what I sell?

Open Google Keyword Planner, which is free with any Google Ads account, and look up the phrases a customer would type. Not your brand name, and not industry language. The words a normal person would use.

Three outcomes:

Hundreds or thousands of searches a month, with commercial phrasing. Words like “buy”, “near me”, “best”, “price”, “hire”, “supplier”. Demand exists and someone is probably already capturing it. Start with Google.

Almost nothing. Either the category is genuinely new, or people describe the problem rather than the product. A business selling a product nobody knows exists cannot buy its way into a search that nobody is running. Start with Meta.

Plenty of volume, but all informational. Lots of “how do I”, “what is”, “why does”. People have the problem but have not connected it to a purchase yet. This is the awkward middle, and it usually means Meta first to create the demand, with Google Search there to catch it once it exists.

One more check that takes two minutes: search your main phrase and see who is advertising. If four established competitors are bidding on it, that is inconvenient but it is also confirmation the channel converts. Nobody keeps paying for clicks that do not pay for themselves.

When is Meta the better first channel?

Meta is the better place to start in four situations.

The product is visual and impulse-friendly. Anything a person can want on sight. Clothing, homeware, food and drink, jewellery, anything with a strong before and after.

Nobody is searching for it yet. A new category, a novel format, or a service people put up with rather than solve.

The buyer is defined by who they are, not what they typed. New parents, dog owners, people who have just moved house. Meta targets people. Google targets moments.

You need audience data more than you need sales this month. Meta will show you which message and which creative lands, faster and more cheaply than search will, because you are not paying per click on a limited pool of keywords.

The trade-off is honesty about the timeline. Search converts faster because the intent is already there. Meta usually takes longer to get to a return, because you are paying to create the intent first.

Can I not just run both?

Eventually, yes. At the start, usually not, and the reason is arithmetic rather than principle.

Both platforms need a certain amount of conversion data before their automated bidding works properly, and both publish what that looks like. Google’s own guidance for Target CPA is at least 30 conversions in the last 30 days, and 15 for Target ROAS. Meta’s learning phase wants roughly 50 optimisation events per ad set per week before it settles.

Split a small budget across two platforms and you can end up below both thresholds at once. Two accounts learning badly is a worse outcome than one account learning well, and it is the most common mistake I see in accounts that arrive already half-built.

The practical version: get one channel to the point where it reliably produces conversions and you understand its numbers. Then add the second. If your total monthly ad budget is under about £2,000, that is a sequencing decision, not a preference.

What about the tracking, now that both platforms measure themselves?

This matters more than the platform choice and gets a fraction of the attention.

Each platform reports on its own contribution using its own rules, and both will happily claim the same sale. Google attributes across its network with its own model. Meta counts a conversion when someone who saw or clicked an ad buys within its attribution window, whether or not the ad is what made them buy. Add the two reported figures together and you will often find you have “generated” more revenue than the business actually took.

Two things fix most of this without buying anything:

Have one source of truth outside the ad platforms. Your Shopify or GA4 numbers, or better, whatever your accounts say you actually sold. Platform figures are for steering campaigns. Your own numbers are for deciding whether any of it is working.

Understand the reporting lag before you panic. Conversions get attributed back to the day of the click, not the day of the sale, so the last few days of any report always look worse than they will turn out to be. Judging a week on Monday morning is how good campaigns get switched off.

If you only do one thing before spending money on either platform, verify that your conversion tracking fires correctly and counts what you think it counts. An account with broken tracking is not a marketing problem, it is a measurement problem, and no amount of budget fixes it.

Does AI change the answer?

It changes the shape of both, and it makes the underlying question more important rather than less.

On Google, more of the buying journey now happens inside AI Overviews and AI-assisted results, where a user gets an answer without clicking anything. Informational queries are losing clicks fastest. Commercial queries, the ones where someone is choosing a supplier, are holding up far better, which reinforces the point above: bid on the moments where a decision is being made, not on the ones where a question is being asked.

Both platforms have also moved to automated campaign types, Performance Max on Google and Advantage+ on Meta, that take control of targeting and placement in exchange for conversion data. They work reasonably well when they are fed properly. They fail quietly when the conversion tracking is wrong, because they optimise confidently toward the wrong thing.

The consequence for a small business is slightly counterintuitive. As the platforms automate more of the buying, the value moves to the decisions they cannot make for you: what a customer is worth, what margin you keep, which products you actually want to sell more of, and what a conversion counts as. Those are business questions. No amount of platform AI will answer them on your behalf.

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