Quick answer: A Google Ads account is organised in three tiers: campaigns at the top, ad groups inside campaigns, and keywords plus ads inside ad groups. Getting this hierarchy right is one of the most impactful decisions in any Google Ads account, because it controls budget allocation, targeting precision, and how Quality Score develops at the keyword level.
What Is Google Ads Account Structure?
Every Google Ads account is organised into three main levels: campaigns, ad groups, and keywords/ads. Getting this hierarchy right is one of the most impactful things you can do for campaign performance, yet it is one of the most commonly mismanaged parts of Google Ads.
Think of it like a well-organised filing system. If everything is thrown into one drawer, you cannot find anything. If it is organised clearly, you can see exactly what is performing, what is wasting budget, and what needs attention.
The Three Levels
- Campaign level: Daily budget, bidding strategy, location and language targeting, ad network, campaign type
- Ad group level: Themed cluster of keywords and the ads written for them
- Keyword and ad level: Specific keywords with match types, negative keywords, and the ads themselves
Why Structure Matters
Poor account structure leads to ads that do not match search intent, budget wasted on irrelevant terms, higher cost per click, and lower impression share. Our PPC management service always starts with a structural audit, because no amount of optimisation fixes fundamentally broken architecture.
The Three Levels Explained
1. Campaigns
Campaigns are the top-level container. Each campaign holds its own budget, location targeting, ad schedule, and bid strategy. A common structural decision: separate campaigns for separate goals (one for brand defence, one for lead generation, one for retargeting).
2. Ad Groups
Ad groups sit inside campaigns and hold themed keywords plus the ads that match them. The principle here is tight thematic grouping: every keyword in an ad group should be answerable by the same ad copy and same landing page.
3. Keywords and Ads
Keywords trigger your ads when users search. Within each ad group you should have at least three responsive search ads testing different headlines and descriptions, and a focused list of closely related keywords (typically 5 to 20 per ad group).
Why Account Structure Matters
A poorly structured account looks fine on day one but becomes increasingly hard to optimise. Specifically:
- Quality Score suffers. When ad groups are too broad, ad copy can’t match every keyword closely, which hurts Quality Score and inflates CPCs.
- Budget gets wasted. Poorly grouped keywords mean some get over-served and others starve, regardless of which actually convert.
- Reporting becomes opaque. When everything is in one bucket, you can’t see which themes are profitable.
- A/B testing breaks down. You cannot meaningfully test ad copy if the underlying keywords are too varied.
What Good Structure Looks Like
For a small business running search campaigns, a sensible default structure is:
- One campaign per major goal (brand, services, retargeting).
- Ad groups inside each campaign organised by service or product theme.
- 5 to 15 closely related keywords per ad group.
- 3 responsive search ads per ad group, with at least 8 to 10 headlines and 4 descriptions in each.
- Negative keyword lists at the campaign level to filter out irrelevant queries.
Frequently Asked Questions
How many ad groups should be in a campaign?
There is no fixed rule, but most well-structured campaigns have between 3 and 10 ad groups. The principle: each ad group should be tight enough that one ad copy and one landing page genuinely answer every keyword inside it.
How many keywords per ad group is best?
5 to 20 is the typical sweet spot for tightly themed search ad groups. Below that and you may be splitting keywords too granularly. Above that and your ad copy starts losing relevance to some of the keywords.
Should I separate brand and non-brand keywords?
Yes, almost always. Brand keywords convert at a much higher rate and at a much lower cost. Mixing them with non-brand inflates your reported account performance and makes it impossible to see how non-brand campaigns are really doing.
What is the difference between a campaign and an ad group?
Budget and settings live at the campaign level. Themed keyword groups and the ads that target them live at the ad group level. A campaign holds many ad groups; an ad group holds keywords and ads.
Take this further
Account structure is one of those quiet PPC fundamentals that compounds over time. If you suspect yours is holding back performance, an audit usually pays for itself in the first month.
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