
Most Google Ads accounts leak money in small, unglamorous ways — not through one dramatic mistake, but through dozens of tiny inefficiencies that never get looked at closely enough. Here are five of the most common signs, and what they usually mean.
1. Search terms that keep spending without ever converting
Every account accumulates search terms that technically match your keywords but have nothing to do with buying intent. If you haven’t reviewed your search terms report in the last month, there’s a good chance a portion of your budget is going toward clicks that were never going to convert — quietly, a little at a time, every single day.
2. Ad groups with wildly different performance sitting under the same budget
When one ad group in a campaign converts at 5% and another sits at 0.3%, a shared budget usually keeps feeding both roughly the same amount. Google’s auto-optimisation helps, but it doesn’t fully solve for this — the underperformer keeps eating spend that the top performer could have used instead.
3. Bids that haven’t been touched since the campaign launched
Manual or semi-automated bidding set up months ago rarely reflects today’s competition or conversion rates. If nobody has adjusted bidding strategy recently, you’re very likely paying either too much for clicks that convert poorly, or too little to win auctions you’d actually profit from.
4. Ad copy that’s never been rewritten
Ads that were fine a year ago can quietly decay in relevance as competitors update their messaging and searcher expectations shift. A drop in click-through rate over time is often the first visible symptom — and by the time it’s visible, you’ve usually already been paying more per click than you should for a while.
5. No one can tell you what changed last month
This is the biggest one. If a question like “why did conversions drop in the third week” doesn’t have a quick answer, it means changes are happening without anyone tracking their impact — which also means nobody would notice if a change made things worse.
What to do about it
None of these require a bigger budget to fix — they require regular, structured review. The account manager’s job is really evaluation as much as optimisation: reading what’s happening, ranking what matters most, and making a call. That’s a lot easier when you have something (or someone) doing the reading continuously, rather than during an occasional audit.
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