Is Your Google Ads Account Structure Hurting Smart Bidding?

If you’ve ever looked at a Google Ads report and concluded "Smart Bidding just doesn’t work for us," there’s a decent chance the problem isn’t the bidding at all. It’s how your account is built. A lot of Fort Wayne businesses are running accounts that were set up the "old way" — a separate campaign for every service, every neighborhood, and sometimes every device — because that granularity used to feel like control. In the Smart Bidding and AI Max era, that same granularity is quietly working against you.

The reason is simple: automated bidding learns from conversions, and when you slice your conversions into a dozen thin buckets, each bucket has too little data for the algorithm to learn anything reliable. A new teardown from Search Engine Journal’s PPC analysis by Sarah Stemen lays out the mechanics clearly, and Google’s own documentation points the same direction.¹ This post translates that into what it means for a local advertiser — with the actual consolidation math for a Fort Wayne HVAC or dental budget.

• Smart Bidding strategies generally want around 30 conversions per month at the campaign level before they can optimize reliably.
• Splitting a modest local budget across many campaigns leaves each one with too few conversions to learn from — the single biggest structural mistake we see.
• Google’s own guidance now favors simpler, consolidated, tightly-themed accounts over device, geo, and match-type splits.
• Not every split is wrong. Keep a split when it genuinely changes your budget, your margin target, or the customer experience — kill it when it’s just habit.
• For a typical Fort Wayne advertiser, consolidating can take per-campaign conversions from ~5 to ~30 without spending a dollar more.

This is one of the highest-leverage, lowest-cost fixes in paid search, and it fits directly into the paid-search section of our Fort Wayne Digital Marketing Playbook. You’re not changing your budget or your offer — you’re just letting the algorithm see enough of your results to do its job.

Why does campaign structure affect Smart Bidding at all?

Smart Bidding — Target CPA, Target ROAS, Maximize Conversions, and the strategies baked into Performance Max — sets a bid for every single auction based on signals like device, time of day, location, and query. To do that well, it needs a pattern. Patterns come from conversions. When a campaign has plenty of conversions, the system can tell a genuinely good auction from a bad one. When it doesn’t, it’s guessing.

According to Search Engine Journal’s teardown, campaigns typically need at least 30 conversions per month at the campaign level for the algorithm to evaluate those signals effectively. Below that, the system can’t separate what the article calls "genuine trends from random variance" — a single strong day looks like a pattern worth chasing, and a quiet day looks like a reason to pull back. The bids get jumpy, spend gets wasted, and the results look like Smart Bidding failing when it’s really just data-starved.

Google’s official thresholds line up with this. Its help documentation recommends evaluating a Target CPA campaign over the last 30 days with at least 30 conversions in that window, and notes that most campaign types want at least 15 conversions in the past 30 days before Target ROAS has enough to work with.³⁴ You can technically start these strategies with no history, but "allowed to start" and "has enough data to optimize" are two different things.

What does a "legacy" account structure actually look like?

The old best practice was maximum granularity. The thinking went: if I give every keyword, service, and location its own campaign, I can control each one precisely. That produced structures like Single Keyword Ad Groups (SKAGs), separate exact/phrase/broad match campaigns, desktop-versus-mobile splits, and a different campaign for each town you serve.

The problem is that automation already handles most of what those splits were trying to control. Google’s account-structure guidance for AI now recommends the opposite of the old playbook: group similar keywords into themed ad groups instead of SKAGs, bring match types back together and lean on broad match so the system sees all available intent signals, and remove device segmentation entirely because Smart Bidding already factors device into every bid.² In Google’s framing, you organize by business objective — not by device, not by match type.

Every split you add divides your conversion data. Twelve campaigns don’t give the algorithm twelve times the control; they give it one-twelfth of the signal in each. That’s the trade most legacy accounts never recalculated when bidding went automated. If you’re still deciding how far to lean into that automation at all, we worked through the full decision in how much of your Google Ads a Fort Wayne business should let Google automate.

When should you keep a split — and when should you consolidate?

This is where the honest answer matters, because "consolidate everything" is as wrong as "split everything." A split earns its place when it changes a real decision. It’s dead weight when it only changes a label.

Based on the Search Engine Journal framework, here’s a plain-English version of where the line sits:

Keep the split when it changes:

• The objective — lead generation versus online sales are genuinely different goals.
• The economics — a high-margin service can carry a different Target ROAS or CPA than a low-margin one.
• The budget strategy — emergency after-hours work you’ll pay more to win versus scheduled installs you won’t.
• The creative or landing experience — if the ad and the page a user lands on are meaningfully different.

Consolidate when the split only reflects:

• Duplicate keywords scattered across exact, phrase, and broad match campaigns.
• Desktop versus mobile, with no strategic reason behind it.
• Minor geographic radius variations — serving Fort Wayne, New Haven, and Huntertown is a targeting setting, not three campaigns.
• Any segment that doesn’t tie back to a real economic or strategic difference.

The test is one question: if I merged these two campaigns, would I lose the ability to make a decision I actually make? If the honest answer is no, they should probably be one campaign feeding one pool of conversion data.

What does consolidation do for a Fort Wayne advertiser?

Let’s make it concrete. Say a Fort Wayne HVAC company spends around $3,000 a month across Allen County and generates roughly 60 conversions a month — a realistic figure for a local service advertiser. (If you’re not sure what "normal" spend and cost-per-click look like here, we broke it down by trade in our Fort Wayne Google Ads benchmarks.)

In a legacy build, those 60 conversions get sprayed across furnace, AC, and maintenance campaigns, each split again by Fort Wayne, New Haven, and Huntertown, with a desktop and mobile version on top. That’s easily a dozen campaigns — and about five conversions each per month. Every one of them sits far below the ~30-conversion threshold, so Smart Bidding never gets its footing in any of them.

Now collapse that into campaigns built around real objectives — say one for emergency service calls and one for scheduled installs, with the towns handled as location targeting inside each. Suddenly those same 60 conversions pool into two campaigns of ~30 each. Nothing about the budget or the offer changed; the algorithm just went from blind to informed.

The numbers above follow the same math the source lays out: 60 conversions divided across 12 campaigns is 5 each, and the recommended floor is roughly 30. Your real figures will differ, but the shape holds for almost every local advertiser we audit. This is also why Local Customer Optimization and Performance Max tend to disappoint in heavily fragmented accounts — those systems are even hungrier for consolidated conversion data than standard Search campaigns.

Fort Wayne reality check: the before-and-after audit

Here’s how this plays out on the ground in Allen County. We regularly open a local account and find eight to fifteen campaigns, most of them running on a few hundred dollars and a handful of conversions a month. The owner isn’t doing anything careless — they or a previous agency built it the way the guides said to build it in 2019.

The fix isn’t glamorous. It’s an afternoon of merging duplicate keywords, folding neighborhood campaigns into location targeting, dropping device splits, and reorganizing the survivors around the two or three things the business actually sells differently. For a Fort Wayne restaurant that’s maybe "reservations" versus "catering." For a dental practice it might be "new-patient exams" versus "cosmetic." For an HVAC shop, "emergency repair" versus "system replacement."

Two honest caveats. First, consolidation isn’t free of risk — when you merge campaigns, Smart Bidding re-enters a short learning period, so you’ll want to make the change at a sensible time and hold your nerve for a week or two. Second, you cannot fix structure if your conversions aren’t tracked correctly in the first place; garbage conversion data consolidated into one campaign is still garbage. If your tracking is shaky, start with our walkthrough of no-code conversion tracking before you touch the campaign structure. Conversion accuracy is the foundation everything else sits on, which is exactly why we tie every ad account into clear analytics and ROI reporting — you can’t judge a restructure you can’t measure.

How to run the consolidation without wrecking performance

A sane order of operations keeps you out of trouble:

1. Confirm your conversions are clean and deduplicated first — one source of truth, no double-counting of the same phone call or form fill.
2. Map every current campaign to a real objective. If two campaigns map to the same objective, margin, and audience, they’re consolidation candidates.
3. Merge from the bottom up — pull low-volume, duplicate, and device-split campaigns into themed survivors, keeping the strategic splits intact.
4. Set the bidding strategy at the consolidated level and let it re-learn before you judge it.
5. Compare against a real baseline, not a feeling — which is where your own peer and spend data matters more than a competitor’s. We get into that in our look at Google Ads spend benchmarks.

Done in that order, most local accounts come out the other side with fewer campaigns, steadier bids, and conversion costs that finally make sense.

Let’s audit your account structure

If "Smart Bidding doesn’t work for us" sounds familiar, the next step is a structure audit — counting your real conversions per campaign and seeing how far each one sits below the threshold the algorithm needs. That’s a core part of our advertising and PPC management work for Fort Wayne and Northeast Indiana businesses: we consolidate the splits that are only costing you data, protect the ones that actually drive decisions, and wire the whole thing to reporting you can read. You keep the control that matters and hand the rest to the system that’s better at it.