Google Ads: smart structure that scales

The flat account problem

The most common Google Ads account structure I see when auditing new clients is a small number of broad campaigns covering everything: brand terms, generic category queries, competitor names, and long-tail purchase-intent terms all mixed together. There is no separation, no negative keyword list, and smart bidding is active from day one.

This structure produces one consistent outcome: the algorithm optimises toward volume, not value. It finds the cheapest clicks it can, which are almost never the clicks most likely to convert. CAC rises, ROAS is volatile, and there is no way to identify what is actually working because everything is blended together.

The fix is not complicated. It requires separating campaigns by intent type and giving each one its own budget, bidding strategy, and negative keyword list.

The three-campaign foundation

For most accounts, the right starting structure is three campaigns:

• Brand campaign: Targets your brand name and branded variants. Uses Exact Match. Budget is typically low but non-negotiable — competitors can and do bid on your brand terms. CPC here is cheap; do not let competitors steal high-intent branded traffic.
• High-intent non-brand campaign: Targets specific, purchase-intent queries in your category. For a paid media consultant, this might be "Google Ads consultant Dubai" or "hire PPC agency fintech". Uses Exact Match and Phrase Match only. This is where your acquisition budget should be concentrated.
• Discovery or broad campaign: Uses broad match with a tightly managed negative keyword list to find new converting terms. Budget-capped. The purpose is to generate search term data, not conversions. Winning terms from this campaign get promoted into the high-intent campaign over time.

Competitor campaigns can be added as a fourth tier once the core three are stable and converting, but only if your product has a clear differentiated advantage worth stating in the ad copy.

Negative keyword strategy

Negative keywords are the most underused lever in Google Ads. Without a robust negative keyword list, broad and phrase match campaigns spend significant budget on irrelevant queries. This is not a minor inefficiency: in accounts I have audited, 20 to 40% of spend was going to queries with near-zero conversion probability.

Build negative keyword lists at three levels:

• Account-level negatives: Terms that should never trigger any ad in the account. Typically includes job-seeking terms (CV, salary, jobs, careers), competitor product names you are not targeting, and irrelevant category adjacencies.
• Campaign-level negatives: Terms that are relevant to the account but not to a specific campaign. Brand terms go as negatives in non-brand campaigns. Non-brand terms go as negatives in brand campaigns.
• Ad group-level negatives: Used to prevent overlap between ad groups targeting similar themes.

Review the Search Terms report weekly in the first month of any new campaign. Every irrelevant term you find goes into the appropriate negative list immediately.

Smart bidding: when to activate and when to wait

Smart bidding strategies (cpa" title="Target CPA — see glossary" class="glossary-link">Target CPA, Target ROAS, Maximise Conversions) depend on machine learning that requires sufficient conversion data to function correctly. Activating smart bidding on a new campaign or one with fewer than 30 conversions per month is one of the most common mistakes in Google Ads management.

When smart bidding lacks data, it defaults to optimising for volume, not value. It finds conversions at any cost rather than conversions at a target cost. The result is a temporary drop in CPA as the algorithm chases cheap conversions, followed by rising CPA as conversion quality deteriorates.

The correct sequence:

• Launch with Manual CPC or Maximise Clicks with a bid cap
• Build conversion history for 4 to 6 weeks
• Switch to Target CPA once you have 30+ conversions in the past 30 days
• Allow a 2 to 4 week learning period without major changes
• Scale budget only after CPA has stabilised within 15% of target

Performance Max: last, not first

Performance Max campaigns use Google's full inventory (Search, Display, YouTube, Discover, Gmail, Maps) and full automation. They are powerful when conversion data is strong and the conversion event reflects genuine business value. They are destructive when activated too early or pointed at weak conversion signals.

PMax works by finding the cheapest path to your defined conversion event. If that event is a form fill or a micro-conversion, it will find low-quality form fills at scale. If it is a qualified lead or a purchase with a minimum order value, it performs significantly better.

The rule: add Performance Max only after your standard search campaigns have been running for at least 90 days with stable CPA, and only when your conversion event is a reliable indicator of business value. Use it to extend reach on top of a working base, not as a replacement for a structured campaign architecture.

Account hygiene and ongoing structure maintenance

A well-structured account requires regular maintenance. The structure that works at £5,000/month spend will not work unchanged at £50,000/month. As volume and conversion data accumulate, structure should evolve:

• Winning search terms from broad campaigns should be promoted to exact match in the high-intent campaign
• Ad groups that have generated 500+ impressions with no conversions should be reviewed and either rewritten or paused
• Budget allocation should shift quarterly toward campaigns with the lowest CAC and highest conversion quality
• Landing page testing should run continuously using CRO methodology, not one-off experiments