A Google Ads account is a filing system. Every budget decision, every bid and every report depends on how you filed things on day one. A messy structure does not just look untidy; it spreads data so thinly that automated bidding cannot learn, and it hides which products or services actually make money.
Structure advice has changed a lot. Ten years ago, the fashion was single keyword ad groups (SKAGs) and hundreds of tiny campaigns. In 2026, with Smart Bidding, broad match and AI Max for Search, the best structures are simpler: fewer campaigns, clearly themed ad groups, and splits that only exist when they change a business decision.
This guide explains the three layers of a Google Ads account, when to split or consolidate, how many keywords an ad group should hold, and a step-by-step method for building or rebuilding your structure.
Key Takeaways
- A Google Ads account has three layers: the account, campaigns (budgets and settings) and ad groups (related ads and keywords).
- Split campaigns only when you need a different budget, location, language, bid strategy or goal.
- Theme each ad group tightly enough that one set of ads and one landing page fit every keyword in it.
- Consolidation usually helps Smart Bidding, because each campaign gets more conversion data to learn from.
- Restructuring wipes the learning history your campaigns have built up, so plan structure carefully before launch.
The Three Layers of a Google Ads Account
Google's "About your account organization" page describes the hierarchy in simple terms. The account holds billing and access. Each campaign has its own budget and settings that control where its ads show. Ad groups contain a set of similar ads and keywords.
| Layer | What you control here | Relevant limit (Google Ads Help) |
|---|---|---|
| Account | Billing, users, time zone, currency, conversion actions, account-level negatives | Up to 10,000 campaigns (active and paused) |
| Campaign | Budget, bid strategy, locations, languages, networks, ad schedule | Up to 20,000 ad groups per campaign; 10,000 negative keywords per campaign |
| Ad group | Keywords, ads, landing pages, some audience settings | Up to 3 enabled responsive search ads per ad group; 20,000 targeting items |
Few advertisers come near these limits. The real constraint is not Google's ceiling but your ability to manage, read and act on what you build.
Start Right: Structure Before You Launch
Google's own advice on ad groups is blunt:
“Organize your campaigns and ad groups as you create them.”
— Google Ads Help, Organize your account with ad groups
The reason is practical. Moving keywords and ads around later resets the performance history attached to them, and Smart Bidding has to learn again. A day spent planning the structure saves weeks of relearning later. If you are setting up your first account, our Google Ads beginner's guide walks through the interface itself.
When to Split Into Separate Campaigns
A new campaign should exist because something needs to be different. Good reasons include:
- Budget control: a product line or service that must have a guaranteed spend.
- Geography: regions with different prices, offers or profitability. See our guide to location targeting.
- Language: each language usually needs its own ads and landing pages.
- Bid strategy or goal: a high-margin service on Target ROAS versus a lead-gen service on Target CPA.
- Brand versus non-brand: brand searches convert differently and should be reported separately. Our article on bidding on brand keywords covers why.
- Campaign type: Search, Performance Max, Shopping, Demand Gen and Video each have their own campaign.
Poor reasons include splitting by match type, by single keyword, or by device "just to see". Those splits fragment data without changing a decision.
How to Theme Ad Groups
Google recommends that you "bundle related ads together with related keywords into an ad group." The simplest test is this: could one responsive search ad and one landing page serve every keyword in the group well? If not, split it.
For a plumbing company, "boiler repair", "boiler service" and "boiler installation" are three different intents with different pages and offers, so they deserve three ad groups. "Boiler repair", "fix my boiler" and "boiler not working" belong together.
How many keywords per ad group?
There is no magic number. In its guide to keywords per ad group, Semrush suggests a smaller set of highly relevant keywords is better for small businesses, and that the right count depends on budget, competition and match types. With broad match and AI Max now expanding reach automatically, many well-run ad groups need only a handful of strong keywords plus thorough negatives. Read our guide to keyword match types before deciding.
| Structure style | How it works | Fits 2026? |
|---|---|---|
| Single keyword ad groups (SKAGs) | One keyword per ad group, exact-match control | Rarely; close variants and AI matching undermine the point |
| Single theme ad groups (STAGs) | A tight theme of close keywords per ad group | Yes, the most common modern approach |
| Consolidated, broad-led | Fewer ad groups, broad match plus Smart Bidding | Yes, where conversion tracking is strong |
| Keywordless (AI Max / PMax) | Google matches queries from assets, landing pages and signals | Yes, alongside keyword campaigns, with exclusions |
How AI Max Changes Structure
AI Max for Search is not a new campaign type. Google describes it this way:
It "serves as a continuous optimization layer for your Search campaigns", adding search term matching, text customisation and final URL expansion to campaigns you already have. Google is also moving Dynamic Search Ads into AI Max, with automatic upgrades starting in February 2027.
The structural implication: keywords act more as themes and signals than as strict boundaries. That makes clean ad group themes, relevant landing pages and a solid negative keyword list more important, not less.
How to Build Your Account Structure Step by Step
- List what you sell and group it by margin, priority and landing page.
- Set up conversion tracking before anything else, using our conversion tracking guide.
- Decide campaign splits using only the "something must be different" rule above.
- Create a brand campaign separate from non-brand.
- Build themed ad groups inside each campaign, each with its own landing page.
- Add keywords with a deliberate match type mix and an account-level negative list.
- Write ads per ad group (up to three responsive search ads enabled) and add assets.
- Use a naming convention such as
Search | Non-brand | Boilers | UKso reports read cleanly. - Review after 30 days: merge ad groups with too little data, split ones with mixed intent.
Common Mistakes With Account Structure
- Over-segmentation. Dozens of campaigns, each with a few conversions a month, leave Smart Bidding guessing.
- Mixed-intent ad groups that force generic ads and generic landing pages.
- Brand and non-brand in one campaign, hiding the true cost of new customers.
- Overlap between Search, PMax and AI Max without brand exclusions or negatives.
- Constant restructuring, which keeps resetting learning.
- No naming convention, which makes every report harder to read. More pitfalls are in our list of Google Ads mistakes.
Once your structure is live, a Google Ads experiment is the safest way to test consolidation or a new campaign split before rolling it out.
Related Guides
- Native Advertising: How It Works and When to Use It
- Media Planning: How to Allocate Your Ad Budget Across Channels
- Ad Scheduling in Google Ads: Show Ads When Customers Buy
Frequently Asked Questions
What is the best Google Ads account structure?
One where each campaign exists for a different budget, location, language, goal or bid strategy, and each ad group holds a tight theme that one ad and one landing page can serve.
Are SKAGs still worth using in 2026?
Rarely. Close variants, broad match and AI Max mean single keyword ad groups no longer give the control they once did, and they spread data thinly.
How many ad groups should a campaign have?
As many as you have distinct themes with their own landing page, and few enough that each gets meaningful traffic. Google's limit is 20,000, but practical accounts use far fewer.
Should brand and non-brand keywords be in separate campaigns?
Yes. Brand searches usually convert at much lower cost, so mixing them hides the real cost of winning new customers and makes budgets harder to control.
Does restructuring a Google Ads account hurt performance?
It can, temporarily. Moving keywords and ads resets their history and Smart Bidding needs time to relearn, so plan changes and test them where possible.
Conclusion
A strong Google Ads account structure is simple on purpose: campaigns that reflect real business decisions, ad groups with clear themes, and enough data in each for automation to work. Plan it before you launch, change it deliberately, and test big restructures. If your account has grown messy, our PPC management team can audit and rebuild it. Get a free quote to find out more.
