Google Ads Diagnosis
The campaigns were working, leads were coming in, cost per conversion was stable — then it wasn't. Making random changes to a declining account usually makes it worse. You need to know exactly what changed, when, and which part of the acquisition system broke.
Short Answer
A drop is a time problem — first establish when it started and what changed: account settings, auction conditions, search demand, tracking, landing pages or sales follow-up. Then fix the identified cause. Making random changes to a declining account makes diagnosis impossible.
Performance analysis requires a timeline. Without one, account optimisation becomes guesswork.
Likely Causes
Measurement
Where to check: Campaigns may still be generating results — Google simply stopped measuring them correctly.
Market
Where to check: Fewer people may be searching for your products or services right now.
Auction
Where to check: New entrants or existing competitors raising bids, budgets, and ad quality.
Auction
Where to check: Higher click costs can reduce traffic volume and increase acquisition costs.
Bidding
Where to check: Major campaign changes can destabilise automated bidding temporarily.
Budget
Where to check: Profitable campaigns can lose impression share when available budget is insufficient.
Post-Click
Where to check: Site changes, slower speed, broken forms or weaker messaging reduce conversion rate.
Market
Where to check: Demand fluctuates by month, holiday, weather or industry cycle.
Downstream
Where to check: Campaigns may keep producing viable leads while response time or close rate deteriorates.
Diagnostic Workflow
Confirm tracking is accurate before touching any campaign settings.
Determine the exact date the decline started.
Review Change History and major campaign modifications around that date.
CPC, impression share, lost impression share, Auction Insights, competitor movement.
Search terms, keywords, match types, locations, devices, audiences, networks.
Landing pages, forms, calls to action, page speed, mobile experience, offer positioning.
Compare ad metrics against qualified leads, sales and revenue where data allows.
Before You Touch Anything
Compare the last 7 days against the previous 7, the last 30 against the previous 30, and the current period against the same period last year
Pin down the exact date the decline started before touching any setting
Inspect the Change History around that date — budget changes, bid strategy changes, keyword edits, match type changes, location changes, conversion action changes, and any automated recommendations that were applied
Confirm conversion tracking is still recording correctly — a tracking break looks identical to a real decline in every report
If you can't answer these confidently, the account needs diagnosis before more budget is committed.
Measurement
A regression has a start date and a cause tied to it. An account that has never produced acceptable results is a different diagnosis — that's the full-funnel guide, not this one.
Seasonality repeats — the same dip shows up against the same period last year. Competitor aggression shows up as rising CPC and lost impression share while search demand holds steady.
A tracking break looks like a performance cliff in reports while calls, forms and sales continue arriving. A real decline shows up in business outcomes too.
Common Mistakes
When to Escalate
Every unnecessary change introduces another variable. Verify tracking first, find the exact date it changed, review Change History, compare traffic and lead quality, and make targeted changes based on evidence — not instinct. If the cause still isn't isolatable from the account's own data, an independent audit is the next step.
Related Guides
Tools & Next Checks
FAQ
Find out what changed, prioritise the highest-impact fixes, then rebuild performance systematically.
