Account structure is the decision you make before you write a single ad or set a single bid, and it determines whether your optimization work has any leverage. A poorly structured account concentrates budget inefficiency, limits Smart Bidding's signal, and creates organizational debt that gets harder to fix as the account grows. A well-structured account makes every subsequent optimization decision simpler and more effective.
The right structure is not universal — it depends on your product complexity, your budget, and how mature your conversion data is. But there are structural principles that apply to nearly every account, and anti-patterns that consistently underperform.
The fundamental unit of structure is the ad group. Ad groups determine which keywords show which ads. The quality of this relationship — how tightly keywords and ads are themed within an ad group — directly affects Quality Score, expected CTR, and ad relevance scores. The most common structural mistake is the over-populated ad group: dozens of loosely related keywords sharing a single set of ads. Quality Score suffers because the ads cannot be simultaneously relevant to all the keywords they serve. The fix is smaller ad groups with tighter keyword themes and ads written specifically for that theme.
At the campaign level, the primary decisions are budget separation and bidding strategy alignment. Campaigns should be separated when they have different budget priorities, different target CPAs or ROAS targets, different geographic targets, or fundamentally different match type strategies. Combining high-performing and low-performing products in the same campaign forces a single budget to serve two very different efficiency profiles. The high-performer often gets starved when budget is shared with the low-performer, or the low-performer burns budget that should have gone to the high-performer.
The consolidation question comes up constantly in modern account management. Google's automated recommendations frequently suggest consolidating campaigns and ad groups. The recommendation has logic: Smart Bidding performs better with more conversion data per campaign, and consolidation puts more conversions into fewer campaigns, improving signal quality. The trade-off is control and visibility. A single consolidated campaign for all product categories looks efficient in terms of conversion volume per campaign, but makes it impossible to set different bid targets for products with different margins or different CPA tolerances.
The structure pattern that balances consolidation benefits with control is value-based segmentation at the campaign level. Rather than segmenting by product category (arbitrary for Smart Bidding), segment by conversion value tier. Your highest-margin products go in one campaign with a higher Target ROAS. Your lower-margin products go in a separate campaign with a different target. Smart Bidding gets sufficient signal within each campaign, and you maintain control over the distinct efficiency targets for different product groups.
Brand and non-brand separation is a structural baseline that most accounts should maintain. Branded keywords — searches for your company or product name — convert at dramatically higher rates and at lower CPCs than non-branded keywords. When they compete for budget in the same campaign, the budget dynamics can distort optimization. Branded traffic is largely demand fulfillment, not demand creation; non-branded is where you are actually winning or losing against competitors. Keep them separate so you can evaluate and optimize each independently.
For accounts running both Search and Performance Max, structural separation matters for attribution clarity. Running both campaign types in the same account with overlapping keyword targets creates competition between them that inflates costs and makes it difficult to evaluate each type's incremental contribution. The clean structure: Performance Max handles broad discovery and Google's full inventory; Search handles branded, high-intent non-branded, and competitor terms where you want explicit control over what ad appears. Each campaign type works on different parts of the funnel, and the structure should reflect that separation.
Structure decisions compound over time. A campaign structure built around how your products happen to be organized today may not serve how you need to manage them in 12 months. Build structure around bidding strategy and conversion targets, not around product taxonomy or historical accident. Review your account structure quarterly and ask whether the current segmentation still matches your optimization priorities. Digital Face provides a structural overview of your Google Ads account in your first audit — flagging overpopulated ad groups, budget concentration issues, and campaign segmentation patterns that may be limiting Smart Bidding performance. Free plan at digital-face.nl, no credit card required.