Smart Bidding Ignores Half the Settings You’re Still Fiddling With

The Dials Are Not Connected to Anything

Somewhere tonight, a business owner is tuning their Google Ads like a hi-fi. Mobile bids up 20%. Evenings down 15%. A 10% boost for the town where the good customers live. It feels like control. It looks like expertise.

Here is the uncomfortable truth: if that account runs on Smart Bidding, most of those dials are not connected to anything. Google’s automated bidding ignores percentage adjustments for locations, ad schedules, demographics and audiences, and honours device adjustments only in special cases. The dashboard happily lets you set them anyway.

This is not a scandal, and it is not hidden. Google documents it. But the interface never stops you, so owners keep spending Sunday evenings turning dials that do nothing, while the levers that genuinely steer the machine sit untouched.

This article separates the two: the dead dials you can stop fiddling with, and the live levers where an hour of your time actually moves performance.

What Is Smart Bidding, and Why Does It Ignore You?

Smart Bidding is Google’s automated bidding system. Strategies such as Target CPA, Target ROAS and Maximise Conversions set a unique bid for every single auction, using signals about the searcher in that moment: their device, location, time of day, browsing context and dozens of combinations you cannot see or set manually.

Read that again, and the reason it ignores your adjustments becomes obvious. You set one blanket number for “mobile” across thousands of auctions. The machine prices each mobile auction individually, using far more information than the word “mobile” contains. Your 20% adjustment is a crayon note handed to a calculator.

So Google’s system quietly discards the note. The auction-time model already accounted for device, hour and postcode before your percentage got a look in. Two controls pulling the same rope cause chaos, and Google decided its rope wins.

None of this means you have no influence. It means your influence moved. The job changed from setting bids to teaching the machine what a good outcome looks like, and most owners never got the memo.

The Dead Dials

Here is what Smart Bidding ignores, so you can stop maintaining it.

Location bid adjustments. Ignored. The machine already prices every location per auction.

Ad schedule bid adjustments. Ignored. Bidding up Tuesdays or down evenings changes nothing on tCPA, tROAS or Maximise Conversions.

Demographic and audience bid adjustments. Ignored as bid controls. Audiences still matter as signals and for observation, but the percentage you attach to them is decoration.

Device bid adjustments. Mostly ignored, with two exceptions worth knowing. A -100% device adjustment works everywhere and acts as a full exclusion, useful when a device genuinely never produces business. And on Target CPA specifically, a device adjustment modifies your CPA target for that device rather than the bids themselves. Set a £10 target with +40% on mobile, and you have told Google it may pay £14 for mobile conversions. That is a real control, but it does something different from what most people think.

If you have old campaigns full of these adjustments, they are not hurting much. They are simply archaeology. The danger is the time you spend curating them instead of working the levers below.

The Live Levers

Smart Bidding listens carefully to a small number of things. This is where the fiddling energy should go.

The conversions you feed it

The machine optimises towards whatever you count as success. Feed it every form fill, junk included, and it hunts form fillers. Feed it qualified leads, checked by a human, and it hunts buyers. This is the steering wheel, and most accounts have it set to the wrong destination. If you fix only one thing, fix this.

The target itself

Your CPA or ROAS target is the one true bid control left. Raise the CPA target and the machine bids more ambitiously. Tighten it, and volume falls. Change it in steps of 15-20% at most, because bigger jumps push the campaign back into its learning phase, and give each change one or two conversion cycles before judging it.

The budget

A tightly capped budget constrains what the algorithm can explore, and a raised one widens its hunt. Budget moves change behaviour more reliably than any percentage dial ever did.

The searches you allow

Negative keywords remain fully manual and fully respected. Every junk query you remove is one the machine stops learning from and stops buying. Your weekly search terms routine is Smart Bidding management, whether you think of it that way or not.

The value you declare

Conversion value rules are the modern replacement for the dead adjustments. Instead of “bid 10% more in this town”, you say “a lead from this town is worth 30% more to me”, and the machine prices auctions accordingly. Sanctioned, respected, and far more precise than the old dials.

The true switches

When something genuinely should not run, use the controls that still mean it: switch the ad schedule off entirely for hours you never want, exclude locations outright, use the -100% device exclusion, and use seasonality adjustments for short promotional bursts or data exclusions for weeks when tracking broke. Off is honoured. Percentage nudges are not.

The Translation Table

Old habits die easier with a direct swap. Here is the modern move for each dial you used to turn.

Bidding down evenings because leads are worse? Either accept the machine’s judgement, or schedule off the hours that truly never produce. Half-measures no longer exist.

Bidding up mobile because most traffic is mobile? Spend the energy on mobile landing page speed instead. The machine already bids what each mobile auction is worth; your page decides whether the click converts.

Bidding up the wealthy town? Add a conversion value rule declaring those leads more valuable, or split the town into its own campaign with its own budget if it deserves real priority.

Bidding down a weak audience? Remove it from targeting or leave it as observation. The percentage was never doing anything.

When Manual Bidding Still Makes Sense

Smart Bidding needs food, and its food is conversion data. An account with a handful of conversions a month, or conversions polluted by junk enquiries, gives the machine nothing trustworthy to learn from. Chasing a CPA target on that data starves campaigns and produces wild swings.

In that situation, run simpler: manual or Maximise Clicks bidding, clean query discipline, honest conversion tracking, and patience while real conversion data accumulates. Move to targets once the machine has something true to learn from. Automation is brilliant at scaling truth and terrible at inventing it.

Questions Owners Ask About Smart Bidding

What is Smart Bidding in Google Ads?

Smart Bidding is Google’s automated, auction-time bidding. Strategies like Target CPA, Target ROAS and Maximise Conversions set a unique bid per auction using signals about each searcher. You steer it through targets, budgets, conversion data and exclusions rather than manual bids.

Does Smart Bidding ignore bid adjustments?

Largely, yes. Location, ad schedule, demographic and audience percentage adjustments are ignored. Device adjustments work only as a -100% exclusion, or on Target CPA where they modify the CPA target for that device rather than the bids.

How do I stop my ads showing at certain times or places?

Use real exclusions rather than percentage nudges. Switch the ad schedule off for hours you never want, exclude the locations entirely, and use -100% device adjustments. Smart Bidding honours off. It ignores down-a-bit.

How do I tell Smart Bidding some customers are worth more?

Conversion value rules. They let you declare that leads from certain locations, devices, or audiences carry higher value, and the bidding prices auctions accordingly. This replaced the old bid adjustments as the sanctioned way to express business priorities.

How much should I change my CPA target by?

Steps of 15-20% at most, then wait one or two conversion cycles before judging the result. Larger jumps push campaigns back into the learning phase, which typically runs 7-14 days on healthy volume and longer on thin accounts.

Should I use Target CPA with very few conversions?

No. Targets need steady conversion data to work from, and thin or junk-filled data produces starvation and wild swings. Run simpler bidding while you clean your search terms and accumulate honest conversions, then introduce targets.

Stop Turning. Start Steering.

The hours you used to spend on bid adjustments were not wasted because you were foolish. The game changed underneath a dashboard that kept all its old dials on display.

The new game has fewer controls, and they matter more. Feed the machine true conversions. Set honest targets and move them gently. Keep the queries clean. Declare real value differences. And when something should never run, say off like you mean it.

At SF Digital, we manage Google Ads accounts around exactly these levers, including the weekly query discipline and qualified-lead tracking that Smart Bidding quietly depends on. If your account is still wearing five-year-old bid adjustments, we will show you what is actually connected.

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