Table of Contents
Intro:
Most Google Ads accounts that underperform do not have a bidding problem or a budget problem. They have a structural problem. The way an account is organised — how campaigns relate to ad groups, how keywords are clustered, how landing pages are assigned — determines whether the algorithm can optimise effectively. A poorly structured account forces Google to make poor decisions with good budget. Here is how to build a structure that performs.
The Core Principle — Relevance at Every Level:
Google’s Quality Score is a measure of relevance across three levels: keyword to search query, ad copy to keyword and landing page to ad copy. Every structural decision in a Google Ads account should be made to maximise this chain of relevance. The tighter the relevance between what someone searched, what your ad says and what your landing page delivers, the higher your Quality Score. The higher your Quality Score, the lower your cost per click for the same bid.
Campaign Level Structure:
Separate campaigns by intent stage and by product or service category. Do not combine awareness keywords with purchase-intent keywords in the same campaign — they require different bidding strategies and different budgets. A brand awareness keyword like “what is executive coaching” and a purchase-intent keyword like “executive coach London prices” should live in separate campaigns because optimising one budget toward both objectives will always underserve at least one.
Ad Group Level Structure:
Each ad group should contain keywords that share a single core theme — close enough that one or two ad variations can speak directly to all of them without stretching relevance. An ad group with 50 loosely related keywords will produce generic ads that match none of them precisely. An ad group with 5 to 10 tightly themed keywords will produce specific ads that match most of them closely, driving Quality Score up and cost per click down.
Match Type Strategy:
Use exact match and phrase match for high-intent commercial keywords where you want precise control. Use broad match only in campaigns with strong conversion data and a robust negative keyword list in place. Never launch a new campaign with broad match without negatives — the spend wasted in the first two weeks will cost more than the data it generates is worth.
Landing Page Assignment:
Every ad group should send traffic to a landing page whose headline directly reflects the keyword theme of that ad group. If your ad group is targeting “Google Ads management for ecommerce” your landing page headline should not be “Digital Marketing Services.” It should speak directly to ecommerce Google Ads management. This single alignment change often produces the largest Quality Score and conversion rate improvement in underperforming accounts.
A Google Ads account is not a set of campaigns. It is a relevance architecture. The more tightly you connect what people search to what they see to what they land on, the more efficiently the entire system performs.
Final Thoughts:
Account restructures are one of the highest-leverage interventions in underperforming Google Ads accounts precisely because structure is difficult to change without pausing campaigns and losing history. Build the structure correctly from the start and every other optimisation you make — bidding, creative, landing pages — will compound on a foundation that gives the algorithm what it needs to perform at its best.
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FAQS
Between 5 and 15 tightly themed keywords per ad group is the generally accepted best practice for maintaining relevance. Fewer than 5 may limit reach unnecessarily. More than 15 often means the ad group theme is too broad and the ads cannot speak precisely to every keyword. When you find yourself writing an ad and struggling to make it relevant to all the keywords in the group, that is a signal to split the ad group into two more focused ones.
Quality Score is Google’s rating from 1 to 10 of how relevant your keyword, ad and landing page are to each other and to the user’s search. A higher Quality Score means Google charges you less per click for the same ad position relative to a competitor with a lower Quality Score. The practical implication: a Quality Score of 8 at a $2 bid can outrank a Quality Score of 4 at a $4 bid while costing less per click. Improving Quality Score is often the highest-leverage activity in an underperforming Google Ads account.
Start with manual CPC or Enhanced CPC for the first 30 to 60 days until the account has accumulated sufficient conversion data. Smart bidding strategies like Target CPA and Target ROAS require a minimum of 30 to 50 conversions per month at the campaign level to optimise effectively. Launching with Target CPA on a new account with no conversion history gives the algorithm no baseline to work from and often results in overspending or under-delivery during the early learning period.
Negative keywords are critical and building a comprehensive list before launch is one of the most important structural decisions you will make. Start by identifying broad match and phrase match keywords that could trigger irrelevant searches. Use the Keyword Planner to research search terms related to your keywords and add obvious non-buyers — free, cheap, jobs, careers, DIY, tutorial — as negatives at the account level from day one. Review your Search Terms report weekly for the first month and add new negatives based on actual irrelevant queries your ads have triggered.
Search campaigns give you direct control over keywords, match types, ad copy and bidding at the keyword level. Performance Max campaigns are fully automated — Google decides where to show your ads across Search, Display, YouTube, Gmail and Shopping based on your creative assets and conversion signals. For businesses new to Google Ads, Search campaigns are recommended first because they provide visibility into what is driving results. Performance Max is best used once you have proven conversion data that the algorithm can learn from.
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