The most common Google Ads mistakes South African businesses make come down to a handful of overlooked settings and untested assumptions: the wrong location targeting, tracking the wrong conversions, running broad keywords without proper controls, ignoring the search terms report, choosing automated bidding before the data supports it, spreading a limited budget too thin, sending traffic to a generic homepage, and leaving ad assets underdeveloped. None of this means Google Ads doesn’t work — it means the account isn’t set up to show whether it’s working.
Google Ads can put a business in front of a customer at the exact moment they’re searching for what it sells. But a campaign running isn’t the same as a campaign spending its budget well. Most of the mistakes below happen quietly — a setting overlooked at setup, conversion data that was never accurate to begin with, or a campaign left untouched for months — and for a business working with a limited monthly budget, a handful of wasted clicks a day adds up fast.
1. Using the Wrong Location Targeting
Location targeting matters more for South African SMEs and local service businesses than almost any other setting, because it decides who’s even allowed to see the ad in the first place.
A business operating in Vereeniging, Vanderbijlpark, Sasolburg or Johannesburg doesn’t want to pay for clicks from people elsewhere who can’t realistically become customers. Google’s default option, “Presence or Interest,” reaches people physically in the targeted area and people who’ve simply shown interest in that area — which can include people searching from somewhere else entirely. A separate “Presence” option restricts reach to people who are actually in or regularly in the selected location.
Neither setting is universally correct. The mistake isn’t using Google’s default — it’s never checking whether that default matches the business model. A tourism operator can genuinely benefit from people outside Cape Town researching a Cape Town stay; a plumber who only services the Vaal Triangle almost certainly can’t.
TLDC Tip: Check the campaign’s actual geographic performance regularly, rather than assuming the selected city or radius is quietly filtering out irrelevant traffic on its own.
2. Tracking the Wrong Actions as Conversions
One of the most damaging mistakes is believing a campaign is generating conversions when what’s actually being counted doesn’t represent a genuine enquiry.
A page view, PDF download or general button click can be useful data, but it shouldn’t carry the same weight as a completed enquiry form, a confirmed phone call, a purchase or a quotation request. Google distinguishes between primary conversion actions, which its bidding systems actively optimise toward, and secondary actions, which stay in reporting without steering bids.
If ordinary website engagement gets set as the campaign’s main conversion goal, Google’s automation becomes very good at finding people who click buttons — not people who become customers. For South African lead-generation campaigns, conversion tracking should be the first thing checked before judging whether Google Ads is actually working.
3. Using Broad Match Without Enough Control
Broad match often gets blamed for poor performance, but broad match itself usually isn’t the real problem. Google recommends pairing it with Smart Bidding, since the bidding system can use extra contextual signals when deciding which auctions to enter.
The actual issue shows up when broad keywords run without controlling search intent, conversion goals and irrelevant search terms. A company advertising industrial cleaning equipment doesn’t want to pay for searches like cleaning equipment jobs, DIY cleaning equipment or free cleaning equipment manuals. As Google Ads becomes more AI-driven, advertisers need to feed it better signals — not just give it broader access to the budget.
A September 2026 update worth knowing
Since 1 September 2026, Google has been automatically upgrading Search campaigns that use Dynamic Search Ads, automatically created assets, or a campaign-level broad match setting to AI Max for Search, with the rollout expected to finish by the end of the month. This isn’t inherently bad — Google reports meaningful average performance gains from the fuller AI Max feature set — but targeting behaviour, asset generation and reporting can shift without the advertiser doing anything. Any business running these settings should check their account now rather than be caught off guard by results that suddenly look different.
4. Ignoring Negative Keywords and Search Terms
Negative keywords remain one of the simplest ways to cut unnecessary spend. The Search Terms Report shows the actual searches that triggered an ad, and Google specifically recommends using it to find irrelevant searches worth excluding.
A B2B company selling industrial pumps might discover searches containing jobs, salary, DIY, second-hand or free. Whether those should be excluded depends entirely on what the company sells — but this isn’t a once-off setup task. Search behaviour shifts and new irrelevant query variations appear over time, so a regular search-term review needs to be part of ongoing account management, not a one-time clean-up.
5. Choosing Automated Bidding Before the Data Is Reliable
Google Ads automation is genuinely powerful, but Smart Bidding still depends entirely on the information advertisers feed it. Strategies include Maximise Conversions, Target CPA, Maximise Conversion Value and Target ROAS.
The real mistake isn’t “using automation too early” — it’s automating against poor-quality or insufficient conversion signals. Target ROAS for Search campaigns currently needs at least 15 conversions in the previous 30 days at the conversion-tracking level to become eligible, while Maximise Conversions requires conversion tracking but doesn’t carry that same threshold. Eligibility and reliable optimisation aren’t the same thing, though — many practitioners still wait for meaningfully more data than the bare minimum before trusting a target-based strategy’s early results.
It’s also worth knowing that from August 2026, Google changed how Target CPA and Target ROAS handle budget-limited campaigns, aiming to reduce the performance swings that used to appear when a business increased the budget on an over-performing target-based campaign. Automated bidding keeps changing under the hood — another reason it needs regular review rather than a set-once configuration.
6. Spreading a Small Budget Across Too Many Campaigns
A limited budget doesn’t automatically mean a campaign can’t work. But spreading a modest budget across multiple products, locations, campaign types and audiences can leave every single one short of the data it needs to perform reliably.
A business might run campaigns targeting Johannesburg, Pretoria, Vereeniging, Cape Town and Durban, advertising five different services, all sharing one limited monthly budget. The result is usually fragmented data rather than five working campaigns. Cost per click varies considerably by keyword, location, industry and competition, so there’s no universal minimum budget that applies to every South African business — the better question isn’t “what’s the minimum spend?” but “how much qualified traffic can this budget realistically buy in our specific market?” For smaller budgets, concentrating spend around the single most commercially valuable service or area usually produces clearer data than trying to cover everything at once.
7. Judging a Campaign Before Enough Data Has Been Collected
The opposite problem is constantly starting, stopping and dramatically changing campaigns after only a handful of clicks. Google Ads isn’t a channel that can be fairly judged on a day or two of results — a business needs enough traffic and conversion data to separate a genuine performance pattern from normal short-term fluctuation.
This matters even more with automated bidding involved, since Google’s bidding systems continuously use campaign and account history to predict which auctions are likely to convert. Pulling the plug or changing settings before that history exists effectively resets the learning process. Campaigns still need management — but decisions should follow the data, not a bad day.
8. Sending Every Visitor to the Homepage
A homepage usually has to do a lot of jobs at once — introduce the company, explain several services, show testimonials, and point visitors toward different parts of the site. That makes it useful for general browsing. It doesn’t make it a good Google Ads landing page.
Someone searching industrial valve supplier South Africa should land somewhere that immediately addresses industrial valves, not a homepage where they have to go looking for the relevant service themselves. Google includes landing-page experience as one of the diagnostic components of Quality Score, alongside ad relevance and expected click-through rate — so the path from search, to ad, to a genuinely relevant landing page, to a clear action isn’t just good user experience, it affects what the ad costs.
9. Never Checking Search Partner Performance
Google Search campaigns can also serve across Search Partner sites, and that isn’t automatically bad traffic. The mistake is leaving that network switched on indefinitely without ever checking whether it’s contributing useful conversions.
Google Ads reports performance by network, so businesses should compare traffic, conversions and cost per conversion across sources rather than assuming everything performs the same. If one network keeps spending budget without producing results, that’s worth reviewing on its own.
10. Not Giving Responsive Search Ads Enough Quality Assets
Modern Google Search Ads test combinations of headlines and descriptions automatically — a Responsive Search Ad can hold up to 15 headlines and 4 descriptions, and Google assembles different combinations for different searches.
Using only a handful of repetitive headlines limits how much useful variation Google actually has to test. A stronger set of assets covers a business’s service offering, geographic area, experience, competitive advantage, the customer’s actual problem, credibility, and a clear call to action — not fifteen slightly different versions of the same sentence. Google specifically recommends unique, high-quality assets over repetitive ones for exactly this reason.
The Bigger Mistake: Treating a Working Campaign as Finished
A campaign that performs well in month one isn’t guaranteed to keep performing without attention. Search behaviour changes, competitors change, keyword performance shifts, website pages get updated, conversion tracking quietly breaks, and new search terms appear — and Google itself keeps changing how bidding, matching and ad formats work under the hood, as the AI Max rollout above shows.
Effective Google Ads management means an ongoing review of targeting, search terms, negative keywords, conversion tracking, bidding, landing pages, ad assets and actual lead quality — not a one-time setup that gets left alone once it looks like it’s working.
At TLDC Marketing, Google advertising is treated as part of the wider online marketing ecosystem rather than an isolated source of clicks — connecting Google Ads, website performance, analytics and lead tracking so a business can actually tell whether its advertising is producing results. Explore our Google Marketing Services or our wider Marketing Services.
Frequently Asked Questions
What is the most common Google Ads mistake South African businesses make?
There’s no single mistake affecting every account, but incorrect targeting and inaccurate conversion tracking tend to be the most damaging, since they influence both where advertising money is spent and what Google’s automated systems optimise toward.
Should local South African businesses use Presence Only targeting?
Often, yes, if the business can only serve customers physically in a specific area. It depends on the model, though — a tourism business, for example, may genuinely benefit from reaching people outside the area who are actively researching it.
Is broad match bad for Google Ads?
No. Google specifically supports broad match alongside Smart Bidding. Problems tend to come from combining broad targeting with weak conversion signals, missing negative keywords or infrequent search-term reviews — not from broad match itself.
How much should a South African business spend on Google Ads?
There’s no single minimum budget that suits every business. It depends on keyword costs, competition, location, conversion rates, commercial value per lead, and how many services or campaigns the budget has to support.
Why are my Google Ads getting clicks but no enquiries?
Possible causes include irrelevant search terms, inaccurate location targeting, a weak landing page, a poor mobile experience, incorrect conversion tracking, or an offer that doesn’t match what the searcher was actually looking for. It’s worth reviewing the whole journey from search query to landing page rather than one setting in isolation.
What is Google’s AI Max upgrade, and does it affect my campaigns?
Since September 2026, Google has been automatically moving Search campaigns that use Dynamic Search Ads, automatically created assets, or a campaign-level broad match setting onto AI Max for Search. It can improve performance, but settings and reporting may look different afterwards, so it’s worth checking the account rather than assuming nothing changed.
Not Sure If Your Google Ads Are Actually Working?
Between targeting, tracking, bidding and the AI Max rollout, there’s a lot that can quietly go wrong without ever showing up as an obvious red flag. Let TLDC Marketing review your account and show you exactly where the budget is going.
