In Google Ads, a campaign is the container that decides how money is spent: it holds the budget, the bid strategy, the locations and languages you target, the networks your ads appear on and the goal you are working towards. Everything below it, ad groups, keywords, ads and assets, inherits those settings.
How a campaign works
A Google Ads account has three main layers. The account holds billing, users and conversion settings. Campaigns sit under it and control money and reach. Each campaign then contains ad groups (or asset groups in Performance Max), which hold the keywords or audiences and the ads themselves.
When you create a campaign, Google asks you to choose a type, and that choice decides where your ads can run and how you control them:
- Search Text ads on Google results, triggered by keywords. Covered in detail under search campaign.
- Performance Max One campaign that runs across Search, YouTube, Display, Gmail, Maps and Discover, steered mostly by Google’s automation.
- Shopping Product ads built from a Merchant Center feed.
- Display, Video, Demand Gen and App Visual and video formats across Google’s sites and partner sites, and campaigns that promote app installs.
The settings that matter most at campaign level are the daily or total budget, the bid strategy (manual or automated, and which conversion goal it optimises for), location targeting including the choice between “presence” and “presence or interest”, the ad schedule, and network options such as whether a Search campaign also shows on the Search Partner and Display networks.
Why it matters
Because budget and bidding live at campaign level, the way you split campaigns decides where your money goes. If a London plumber runs boiler repairs and bathroom fitting in one campaign with one budget, the high-volume emergency searches can swallow the budget before the more profitable bathroom enquiries get a look in. Separate campaigns let you fund each line of business on purpose.
Campaign settings are also where the most expensive mistakes hide. A location setting left on “presence or interest” can show a Manchester-only service to people in Spain who once searched for Manchester. A Search campaign with the Display Network ticked can spend a large share of its budget on low-intent banner placements. None of this is visible in the ads themselves; you have to check the settings.
Common mistakes
- Too many campaigns for the budget, so each one has too little data for Smart Bidding to learn from.
- Too few campaigns, so services with different margins or regions share one budget and one target.
- Accepting default network and location settings without reading them.
- Mixing brand and non-brand keywords in one campaign, which makes performance look far better than it is.
- Choosing a campaign type because Google recommends it, rather than because it suits how your customers search.
How to act on it
Start from the business, not the platform. List the services or product ranges that need their own budget, their own target cost per lead or return, or their own geography, and give each a campaign. Keep everything else together so each campaign gathers enough conversions to optimise. A sound account structure usually means fewer campaigns than people expect.
Then open every campaign’s settings and check each one deliberately: networks, location options, languages, schedule, bid strategy and the conversion goals it is allowed to optimise for. Separate your brand campaign from everything else so you can see what new demand actually costs. If you would like a second opinion on how your account is split, that review is the starting point of my Google Ads services.