Most Google Ads accounts I audit are not broken because of bad keywords or weak copy. They are losing money on structural mistakes that quietly waste 30 to 60 percent of the budget every month — and because the campaign still produces some leads, nobody notices the leak.
1. Running broad match without a negative keyword list
Broad match tells Google it may show your ad for anything it considers related to your keyword. Without a negative list constraining it, a dental clinic bidding on “dental implants” ends up paying for “dental implants price philippines diy”, “dental assistant jobs”, and “dental implants gone wrong”.
Open your Search Terms report and read what people actually typed to trigger your ads. In most accounts that have never had a negative list built, a third of the spend is on searches with no commercial intent at all. Add those as negatives, and keep adding weekly — it is maintenance, not a one-time fix.
2. Sending every ad to the homepage
Someone searching “emergency aircon repair quezon city” who lands on a homepage now has to find the service, confirm you cover their area, and locate a contact method. Each of those steps loses people.
The fix is a landing page that matches the ad promise directly — same service, same location, one obvious action. This single change routinely moves conversion rates more than any bid adjustment, which is also why landing page structure matters as much as the campaign itself.
3. Optimizing for clicks instead of conversions
If conversion tracking is not properly installed, Google optimizes toward whatever it can measure — usually clicks. The algorithm then dutifully finds you the cheapest possible clicks, which are almost never the most valuable ones.
Set up conversion tracking for the actions that actually matter: form submissions, phone calls, bookings. Then switch the campaign to a conversion-based bidding strategy. An account optimizing for clicks and one optimizing for conversions will spend the same budget in completely different places.
4. Ignoring location and schedule settings
Two defaults quietly drain budget. Google’s default location setting includes people “interested in” your target area, not just those in it — a local service business can end up paying for clicks from other countries. And by default your ads run 24/7, including hours when nobody answers the phone.
Set location targeting to presence rather than presence-or-interest, and check the hour-of-day report before setting a schedule. If leads arriving at 2am never convert, that spend belongs in your business hours instead.
5. Treating the account as set-and-forget
Google Ads decays. Competitors change bids, search behaviour shifts, ad fatigue sets in, and new irrelevant search terms appear constantly. An account left alone for six months is not stable — it is slowly getting more expensive.
A basic maintenance rhythm: review search terms and add negatives weekly, check conversion cost by campaign monthly, and refresh ad creative every quarter. That is not a large time commitment, and it is the difference between a campaign that compounds and one that quietly erodes.
How to check your own account in 20 minutes
Open your Search Terms report for the last 30 days and sort by cost. Read the top 50. If more than a handful are searches you would never want to pay for, mistake one is costing you real money. Then check whether your conversion column is actually populated — if it is empty or tracking only page views, mistake three is the bigger problem.
Those two checks alone usually surface most of the waste in an underperforming account, and neither requires any tooling beyond the Google Ads interface itself. If you are weighing paid ads against organic investment more broadly, that tradeoff is covered in Google Ads vs. SEO.
Key takeaways
- Broad match without a maintained negative keyword list is the single most common source of wasted Google Ads spend.
- Sending paid traffic to your homepage instead of a matching landing page loses conversions at every extra step.
- Without proper conversion tracking, Google optimizes for cheap clicks rather than actual customers.
- Check location targeting is set to presence, not presence-or-interest — the default wastes local budget on people outside your area.
Frequently asked questions
Why is my Google Ads campaign not converting?
The most common causes are irrelevant search terms triggering your ads (fix with a negative keyword list), sending traffic to a homepage instead of a matching landing page, and missing conversion tracking so Google optimizes for clicks rather than leads.
How much Google Ads budget is typically wasted?
In accounts that have never had a negative keyword list built and maintained, roughly 30 to 60 percent of spend commonly goes to searches with no commercial intent. Reading your Search Terms report is the fastest way to see how much of that applies to your account.
Should each Google Ads campaign have its own landing page?
Ideally yes. A landing page that matches the specific service and location in your ad converts considerably better than a general homepage, because it removes the steps where visitors have to hunt for what your ad promised.
How often should Google Ads campaigns be reviewed?
Review search terms and add negative keywords weekly, check cost per conversion by campaign monthly, and refresh ad creative quarterly. Accounts left untouched for months tend to get progressively more expensive rather than staying stable.
SEO specialist and digital marketer from the Philippines. I handle SEO for the country's biggest media and publishing brands — Vogue Philippines, MEGA, Billboard Philippines, Rolling Stone Philippines — alongside clinics, e-commerce stores, and startups. Every article here comes from real client campaigns.
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