5 Google Ads Mistakes That Burn Your Budget (We See These Every Week)

When we audit a Google Ads account for the first time, we usually find the same handful of mistakes. They're not advanced. They're not subtle. They're the kind of thing that gets missed when a business owner runs ads themselves without proper training, or when an agency sets things up once and never optimises after. Each one silently wastes money every single day. Here are the five we see most often.

If you don't have conversion tracking set up, you have no idea which ads are actually generating leads. You see clicks, you see cost, but you can't see which keywords, which ad copy, or which campaigns produced the form fills and phone calls that matter. You're optimising for the wrong thing — usually clicks, which is what Google charges you for.

The fix: set up conversion tracking before spending another rand. Track form submissions, phone calls from ads, and any other action that represents a real lead. Without this, every other optimisation is guesswork.

Broad match keywords let Google show your ad for anything it considers loosely related. "Web design" broad-matched can trigger your ad for "free web design templates", "DIY website builder", and dozens of other searches that will never become customers.

The fix: use phrase match or exact match for most keywords. Build a strong list of negative keywords — terms you explicitly don't want your ad to show for.

Your homepage is built to introduce your business to anyone who lands on it. Someone clicking an ad for "ecommerce web design Johannesburg" wants to see a page specifically about ecommerce web design — your services, your process, examples, a way to get in touch. They don't want a homepage carousel that tries to be everything to everyone.

The fix: build dedicated landing pages for each major service or campaign. Match the page content to the ad. Conversion rates typically double or triple compared to sending traffic to the homepage.

The search terms report shows you exactly what people typed into Google before clicking your ad. It's the most useful report in the entire platform, and most accounts have never looked at it. You'll find searches you'd never want to pay for, and searches you'd never have thought to target — both worth knowing.

The fix: review the search terms report at least monthly. Add irrelevant terms as negative keywords. Pull strong-performing terms into their own tightly themed ad groups with custom copy.

If you're a B2B business, your customers aren't searching at 2am on Sunday. If you're a Johannesburg-only business, paying for clicks in Cape Town is wasting budget. Most accounts run ads in all locations at all times by default, because that's what Google sets up when you create a campaign.

The fix: check your location and schedule settings. Run ads only in the areas you serve, only during the hours your business can respond. Pause the rest. Easy 20–30% efficiency gain on most accounts.

Google Ads isn't broken. It's actually one of the highest-ROI channels available to SA businesses when set up properly. The problem is that "properly" requires ongoing attention — and most accounts get set up once, ignored, and quietly drain budget. If you're spending anything meaningful on Google Ads — and if you're unsure what "meaningful" looks like for your industry, our SA Google Ads budget breakdown covers what's realistic — audit it against this list. The fixes are mostly free and the payoff is fast.