Should you add Meta Ads to your Google Ads? Run these four checks first.

You've been running Google Ads for a year or two. Early results were strong: leads coming in, cost per acquisition at a level that made sense, a clear line between spend and return. Then, somewhere in the last two quarters, things flattened. Not collapsed. Just plateaued. The campaigns are running, the budget is being spent, but the trajectory has changed.

Someone — you, your marketing manager, a board member who's been on LinkedIn too long — suggests adding Meta. It feels like the right move. Competitors are active on Instagram. It's time to diversify.

Maybe. But there's a diagnostic step that almost nobody takes before making that call, and skipping it is how businesses end up with two mediocre channels instead of one strong one. The question isn't whether Meta is worth running — for many businesses, it absolutely is. The question is whether you've actually reached the ceiling on Google Ads, or whether it just feels that way. Those are very different problems with very different solutions. Before you split your budget, run the checks.

Three reasons businesses add a second channel — and which one actually holds up

There are really only three reasons a business with an established Google Ads account decides to add Meta. Two of them are understandable but wrong. One of them is legitimate.

Plateau anxiety

Performance has flattened and the instinct is to do something. This is by far the most common trigger, and the least reliable one. A plateau on Google Ads can mean a lot of things: audience exhaustion, yes, but also a bidding strategy that's hit its ceiling, a landing page that was converting well eighteen months ago and isn't anymore, a match type problem that's quietly drifted the account toward lower-intent queries, or a measurement issue that's making performance look worse than it is. Adding Meta doesn't fix any of those. It just gives you a second set of numbers to stare at while the original problem continues.

The uncomfortable truth about plateau anxiety is that it's often a reluctance to do the harder diagnostic work on the existing channel. Launching something new feels like action. Auditing what's already running feels like admin.

Competitive pressure

A competitor is visibly active on Meta. Their ads keep appearing in your feed. Someone screenshots one and drops it in Slack. The implication is clear: they know something you don't.

Maybe. But you don't know their margins. You don't know their goals for that channel. You don't know whether it's working. A business running brand awareness campaigns on Meta at break-even because they're preparing for a funding round looks identical, from the outside, to a business running profitable direct response campaigns. Copying the surface behaviour without understanding the strategy behind it is how budgets get wasted.

"Competitive presence on a channel is a data point worth noting. It is not, on its own, a reason to act."

A genuine channel ceiling

Search volume for your core terms is finite. You know this because you've checked: impression share is high, search term coverage is solid, you're capturing the available demand efficiently, and there simply isn't more of it to capture at a cost that makes sense. The Google opportunity has been genuinely maximised, and the next increment of growth requires reaching people who aren't searching yet.

This is the legitimate reason. It's also the least common trigger in practice. Most businesses that believe they've hit a Google ceiling haven't actually run the checks that would confirm it.

Four checks to run before you add a second channel

These are not complicated. Anyone with access to their Google Ads account and Google Analytics can run all four in under an hour. The point isn't to find reasons to stay on Google indefinitely — it's to make sure the decision to add Meta is based on evidence rather than instinct.

The real reason Google and Meta aren't interchangeable

Even when all four checks come back clean, there's a deeper strategic question that most channel mix discussions never quite reach. It's not just about whether Google has more to give. It's about what kind of growth you're actually trying to generate.

This is why the two channels are so frequently misunderstood in relation to each other, and why the businesses that run both well treat them as distinct investments with distinct roles rather than competing line items in the same budget. We covered the mechanics of how Google and Meta have converged as platforms in an earlier piece — but the strategic distinction between capturing and creating demand is the more important frame for this decision.

The question your business actually needs to answer: does more growth require capturing more existing demand, or creating demand that doesn't yet exist as a search query? For a business selling something people already know to search for — a service with clear intent signals and reasonable search volume — the growth ceiling on Google is a volume ceiling. Once you're capturing that efficiently, the next increment requires reaching people before they search. That's Meta's job. For a business selling something with low search volume — a new product category, a solution people don't yet know they need, something that has to be seen to be desired — Google was always going to be limited. Meta isn't the second channel here; for some businesses it should have been the first.

Why Meta's contribution gets systematically undervalued

There's a measurement problem sitting underneath all of this that's worth naming directly, because it affects how most businesses perceive Meta's performance and therefore whether they continue investing in it.

Meta operates predominantly at the top and middle of the funnel. It builds consideration, plants intent, warms audiences who will eventually convert — often through search, often days or weeks later. Last-click attribution, which remains the default reporting view for most businesses, assigns the conversion to whatever touchpoint preceded the final click. That is almost never Meta.

The result is that Meta's reported ROAS tends to look worse than Google's reported ROAS even when Meta is doing meaningful work in the background. Businesses that evaluate the two channels against the same ROAS benchmark will consistently undervalue Meta and over-rely on Google — not because Google is genuinely more effective, but because Google's contribution is easier to measure. The limitations of ROAS as a measurement framework are a wider problem than just the Google vs Meta question, but they're especially visible here.

Running both channels properly means accepting that you will not be able to perfectly attribute every conversion to a single source — and that attempting to do so will lead to systematically wrong budget decisions. The businesses that have figured this out treat MER as the primary scorecard and platform-reported ROAS as a directional signal rather than a verdict.

What this looks like in practice

The situation

A boutique strata management firm has been running Google Ads for nearly two years. Core services — owners corporation management, building management, strata administration — have clear, specific search demand, and the account was built around it. Terms like "strata management Sydney" and "owners corporation manager Eastern Suburbs" drove a steady flow of qualified enquiries in the early months. CPL was manageable. New scheme acquisitions were tracking well.

Somewhere around month fourteen, things flattened. Enquiry volume plateaued. CPL crept up. The conversation about adding Meta started shortly after — strata committee members are property owners, they're on Facebook and Instagram, and competitors were starting to appear there. Before making the call, they ran the four checks.

What the checks revealed

Search impression share on core terms was sitting at 41%. Not a ceiling — a gap. A meaningful share of eligible auctions for their highest-intent keywords were being lost, split between budget constraints and Quality Score issues that had developed as the account aged without structural review. Several ad groups that had performed well initially were now competing against each other across campaigns.

The search term report revealed gaps in geographic coverage. The firm serviced the Eastern Suburbs, CBD, and inner west, but campaign structure hadn't kept pace with that range. High-intent, location-specific queries for several suburbs in the service area were either missing or being captured inefficiently at the wrong bid.

Conversion rate had slipped roughly 15% over the previous two quarters. Traffic quality had held. The issue was a contact and proposal request page that hadn't been reviewed since the account launched. For a business where the conversion event is a proposal request rather than an immediate purchase, page clarity and trust signals matter disproportionately.

MER had held broadly steady — suggesting the account wasn't fundamentally broken — but steady MER against rising CPL meant efficiency was being maintained by winning easier, lower-value enquiries rather than the scheme acquisitions that actually moved the business forward.

The recommendation

Don't add Meta yet.

Not because Meta wouldn't eventually make sense — reaching property owners and committee members through targeted social advertising is a legitimate strategy. But because the Google Ads account had not come close to reaching its ceiling. The addressable market for strata management in inner Sydney is genuinely finite: there are only so many schemes, and only so many committees actively looking to switch managers at any given time. That makes capturing available search demand efficiently more important here than in almost any other sector. Adding a second channel before that foundation was solid would have been expensive distraction. The work instead: restructure campaigns around geographic coverage gaps, resolve ad group cannibalisation, rewrite the proposal request page with clearer trust signals and a more direct call to action.

Ninety days later

Impression share on core terms moved from 41% to 76%. CPL dropped. Enquiry volume increased. The proposal page rewrite recovered most of the conversion rate decline — clearly stating response time and the proposal process on the page itself made a measurable difference for a service where the decision-maker is a committee, not an individual.

And then, predictably, volume plateaued again — but this time at a higher level, with a cleaner account, and with impression share genuinely high. That's when the Meta conversation became worth having properly. Not as a direct response channel chasing immediate conversions — the economics don't work for a service with a long consideration cycle and a committee-based decision process. But Meta, running a lead gen objective against a Lookalike Audience built from their existing scheme contacts, with content that educated rather than sold. Designed to build consideration among people who weren't actively searching yet but would be within the next six to twelve months.

The point isn't that Meta was wrong at month fourteen and right at month nineteen. The point is that at month fourteen it would have been compensatory — additional spend papering over fixable structural problems. At month nineteen it was genuinely additive, layered on top of a Google Ads account that was working properly and had demonstrably reached the limit of available search demand. That distinction — compensatory versus additive — is worth holding onto. It's the difference between a channel mix that compounds and one that just costs more.

Budget, sequencing, and some practical guardrails

The diagnostic framework above applies regardless of budget size, but budget does determine what's actually executable. The thresholds below are indicative — the right figures vary by industry, competitive landscape, and cost per click in your category.

For the in-house marketer building a channel mix recommendation for a founder or CFO: the demand capture versus demand creation framing is the most defensible way to structure the argument. The question "should we add Meta?" invites a debate about platform quality that nobody in the room is qualified to resolve. The question "have we exhausted available search demand, and does our next increment of growth require creating demand that doesn't yet exist as a search query?" is a strategic question with a diagnosable answer. It reframes the conversation from opinion to evidence — and it's considerably harder to dismiss.