Google Ads campaigns don't manage themselves. Most accounts I audit have been set up with reasonable intentions and then left largely untouched: the same keywords, the same bids, the same ad copy running for months or years. The platform changes around them, competitors adjust their strategies, and the account quietly loses efficiency. The campaigns that consistently improve are the ones that are actively worked.
This isn't about making constant tweaks. Overcorrecting based on a single day's data is one of the most reliable ways to damage a campaign. It's about structured, regular optimisation: knowing what to look at, how often, and what to do with what you find.
I took over a campaign for a North Wales accountancy firm last year that had been running untouched for eight months. The original setup wasn't bad. But the search terms report had never been reviewed, and in those eight months it had accumulated over 400 irrelevant queries that were actively triggering spend. The same ad copy from day one was still running. No tests, no changes. Monthly spend had stayed constant but the cost per enquiry had doubled as competition in the sector increased. Eight months of drift is hard to reverse quickly, but a structured review over four weeks brought CPA back to where it had started.
The "set it and forget it" approach feels lower risk because you're not making changes. In reality, doing nothing in an active ad auction is itself a decision, and often a costly one.
Start with clear objectives and the right metrics
Optimisation without a clear objective is just activity. Before reviewing performance, you need to know what you're trying to achieve and which metrics tell you whether you're achieving it.
For most businesses, the objective is straightforward: generate leads or sales at an acceptable cost. The relevant metrics are cost-per-conversion (CPA), conversion rate, and return on ad spend (ROAS). These tell you whether the campaign is profitable.
Secondary metrics (click-through rate, Quality Score, impression share) provide context and diagnostic information, but they're not what the campaign ultimately exists to improve. An ad with a high CTR that generates leads at three times your target CPA is failing, not succeeding. Keep the primary objective in view when interpreting data.
What to review weekly
A weekly review doesn't need to take long if you know what you're looking for. The three things worth checking every week:
The search terms report. Open Keywords > Search terms and look for new queries that triggered your ads. Add irrelevant terms as negative keywords. This is the single most consistent source of waste in most accounts and requires regular attention because new search terms appear constantly. For a full breakdown of how to build and maintain a negative keyword strategy, The Power of Negative Keywords covers everything from match types to shared lists.
Budget pacing. Is the campaign spending its daily budget consistently, or running out early? Running out early means the algorithm is losing data from part of the day. Consistent underspend might mean targeting is too tight or bids are too low. For checks like these, using automated rules to handle routine monitoring can save time and catch issues before they compound.
Conversion performance. Is the campaign converting at or better than your target CPA? If there's a sudden change, check whether something changed in the account, on the landing page, or in tracking configuration before drawing conclusions.
What to review monthly
Monthly reviews should go deeper into what's working and what isn't.
Ad copy performance first. Google Ads shows performance data per responsive search ad at the asset level: which headlines and descriptions are getting impressions and which are being rated "Low." Pause or replace underperforming assets and add new variations to test. The Experiments feature in Google Ads allows you to run controlled split tests between ad variations; use it rather than making ad changes and relying on memory.
Keyword and ad group performance next. Which keywords are driving conversions? Which are spending without converting? Keywords with significant spend and no conversions over 60–90 days are candidates for pausing or reducing bids. Don't act on less than 60 days of data for keywords with low impression volume. The sample is too small.
Landing page performance matters more than most accounts acknowledge. Conversion rate data from Google Analytics 4 shows how your landing pages are performing relative to each other. A campaign that sends traffic to a page converting at 2% should be tested against an alternative. The potential gain from moving to even a 4% conversion rate is the equivalent of halving your CPA. Landing page keywords and Quality Score are directly connected, and improving landing page relevance is one of the highest-return monthly tasks in any active account.
The Auction Insights report shows how you compare to competitors in terms of impression share, overlap rate, and position above rate. If a competitor is gaining share in your key terms, that's worth knowing before you see it show up as declining performance.
Running experiments properly
The Google Ads Experiments feature (Campaigns > Experiments) lets you run A/B tests within your account with a controlled budget split. You can test bid strategies, landing pages, ad copy, and targeting changes without exposing your whole campaign to an untested variable.
The key discipline: test one thing at a time, run tests long enough to accumulate statistical significance (at least two weeks, ideally four for lower-volume campaigns), and make a decision based on conversion data, not CTR or impressions.
Most accounts never use Experiments. They make changes based on intuition and then can't tell whether performance changed because of what they did or because of external factors. A structured testing habit compounds over time. Each tested improvement becomes the new baseline for the next one.
Scaling what works
When a campaign is converting consistently at or below target CPA, increasing the budget is the right move. The temptation to hold back spending on something that's working is understandable but counterproductive. If every £100 spent produces £300 in value, spending more is the obvious decision.
The caveat: don't increase budgets dramatically in one step. Smart Bidding algorithms treat significant budget changes as a signal to re-enter a learning period. Increasing a budget by 20 to 30% at a time, then waiting a week before increasing again, keeps the algorithm stable while scaling. It's also worth understanding how Google's automation can quietly push your costs up before handing full control to Smart Bidding.
Final thoughts
Ongoing optimisation is what separates accounts that improve over time from accounts that plateau and decay. The basics, weekly search terms review, monthly performance analysis, and structured ad testing, aren't complicated. They require consistency more than expertise.
Google Ads management in North Wales. If you'd like a free audit to see where your campaigns stand and what I'd prioritise, get in touch.
