Smart Bidding ships with diagnostics. Most accounts never read them.
The Bid Strategy Status indicator and the bid simulator inside Google Ads tell the operator three things: whether the bidding algorithm is converged, whether the target is over-constraining the system, and whether the conversion signal volume is enough for the algorithm to learn against. The data is one click away from any campaign view. Most accounts the firm audits have never been read by the team running them.
This is the diagnostic routine the firm runs on every Search and pMax campaign during quarterly reviews. Twenty minutes per campaign, surfaces actionable decisions, and prevents the slow bid-strategy decay most accounts experience by month four of a campaign’s life.
What Bid Strategy Status tells you
Bid Strategy Status appears as a tag next to each campaign’s bid strategy. Five states matter.
“Learning” means the algorithm is in active learning, which happens after launch, after significant settings changes, or after a target change. Performance is expected to be volatile. Most campaigns exit Learning within 5-7 days; campaigns stuck in Learning for more than 14 days usually have a conversion-volume problem.
“Eligible” means the strategy is operating normally. The algorithm is converged and performance should be stable relative to the target.
“Misconfigured” means the strategy cannot operate properly. Usually a conversion tracking issue or a bid strategy mismatch (e.g., Target ROAS without value tracking). This is the most actionable state; the fix is usually a tracking configuration change.
“Limited” means an external constraint is preventing the strategy from operating optimally. Common causes: budget too low for the target, audience too narrow, conversion volume too thin. The diagnostic information names the specific constraint.
“Learning (Conversion)” or “Limited (Conversion)” means the conversion signal is the problem. Either the campaign is producing too few conversions per week (under 30-50 typically) or the conversion definition is too deep for the volume. The fix is either to lower the conversion threshold or to add Smart Bidding Exploration to give the algorithm more data to work with.
What the bid simulator tells you
The bid simulator predicts how performance would change at different target settings. For Target CPA strategies, it shows expected conversion volume at different target CPA values. For Target ROAS, it shows expected revenue at different ROAS targets.
Two diagnostic uses.
Use one: detecting over-constrained targets. If the simulator predicts substantially more conversions at a marginally lower target ROAS (say, 25% more conversions for a 10% lower ROAS), the current target is leaving meaningful volume on the table. The trade may or may not be worth it depending on margin, but the conversation should happen with the finance team.
Use two: detecting under-constrained targets. If the simulator predicts substantially fewer conversions at a marginally higher target (say, 50% fewer conversions for a 15% higher ROAS), the current target is operating in a region where small target changes produce outsized volume changes. That instability indicates the strategy is not as converged as Bid Strategy Status suggests.
The 20-minute diagnostic routine
For each Search and pMax campaign, run this monthly:
Open the Bid Strategy Status indicator. Note the state. Anything but “Eligible” gets investigated immediately.
Open the bid simulator. Note the curve shape around the current target. A steep curve indicates instability; a flat curve indicates the campaign has room to push the target either direction without dramatic volume changes.
Open the Auction Insights report for the same campaign. Note any meaningful competitor presence change in the trailing 90 days. Competitor entries often correlate with the “Limited” status changes that surface in Bid Strategy Status.
Open the conversion volume per week. If conversions per week are below 30, Smart Bidding has thin data to work with. Either consolidate the campaign with a related one to combine signal, lower the conversion threshold to a higher-volume event, or enable Smart Bidding Exploration to expand the signal pool 1.
Cross-reference: does the Bid Strategy Status state match what the volume and simulator data suggest? If not, the discrepancy is the question worth investigating.
What this surfaces in real accounts
Three patterns the firm sees consistently after running the routine.
The first pattern: campaigns showing “Eligible” status while quietly starving for signal underneath. The status tag is generous; the bid simulator and the conversion volume tell the truth. These campaigns benefit from consolidation with adjacent campaigns or from adopting Smart Bidding Exploration (covered in the prior piece) to expand the data the algorithm can learn against.
The second pattern: campaigns with steep simulator curves around the current target. These are the campaigns where small target changes (often made reactively to a CFO complaint about CPA) produce dramatic volume drops. The diagnostic shows the volatility; the right response is to leave the target alone and address the underlying issue (creative, landing page, or feed).
The third pattern: “Misconfigured” status that has been live for months without anyone noticing. Almost always a tracking issue. The fix is usually a half-day of work and produces immediate performance recovery. The cost of the silent misconfiguration is whatever performance the campaign would have produced with proper bidding over however many months the state has been live.
What this changes about the bid strategy conversation
Most accounts have the wrong bid strategy conversation. The default conversation is: should we lower the target, raise the target, or switch from Target CPA to Maximize Conversions? The diagnostic data usually shows that none of those changes is the right one. The right change is upstream: more conversion volume per campaign, cleaner conversion event tracking, or a creative or landing page fix that improves CVR.
The bid strategy is the lever the operator can pull most easily inside Google Ads. The operator pulls it whether or not it is the right lever to pull. The diagnostic routine surfaces which campaigns are getting the right pull and which campaigns need attention somewhere else entirely.
Twenty minutes a month, per campaign. The campaigns that get the routine outperform the campaigns that do not by margins that compound over a year.