You can't fix a Google Ads account by guessing what the competition is doing. Most South African advertisers eyeball a rival's Google review count or website design and call that "competitor research". It isn't. A real google ads competitor analysis uses Google's own auction data plus a few outside tools to show you exactly where you're losing impression share, what messaging is beating yours, and where the gaps are worth exploiting.
- A proper google ads competitor analysis starts in Auction Insights, not a screenshot of a rival’s ad.
- Impression share overlap above 40% means you’re fighting the same searches every single day.
- Spy tools show ad copy and estimated traffic, never real budgets or true ROAS.
- Build your bidding and copy around what competitors consistently skip, not what they spend.
Why this matters
Every Rand you spend on a keyword where a bigger competitor already dominates the auction is a Rand fighting an uphill battle. Google Ads is a real-time auction. If three competitors are bidding the same head terms with tighter Quality Scores and better landing pages, your CPCs climb and your impression share sits under 20% no matter how much you increase budget.
Competitor analysis isn't a one-off exercise you do before launch. Accounts drift. A competitor that wasn't in the auction in January 2026 can dominate it by June. Reviewing the auction landscape quarterly is the only way to catch that shift before it eats your budget.
What you'll need
- Access to Google Ads (Auction Insights lives under Insights and Reports)
- A free Google account for incognito searches from a South African IP
- One paid research tool: SEMrush, SpyFu, or iSpionage (all have limited free tiers)
- 60 to 90 minutes, done properly, not skimmed
- A spreadsheet to log competitors, keywords, and ad copy angles over time
The steps
1. Pull your Auction Insights report first
This is the only data source in this whole process that Google guarantees is accurate, because it comes straight from the auction, not a third-party estimate.
Go to any active campaign, click Insights and Reports, then Auction Insights. Set the date range to the last 30 days minimum, ideally 90 for a stable read in 2026's slower January-to-March trading period. Look at four columns: Impression Share, Overlap Rate, Position Above Rate, and Top of Page Rate.
An Overlap Rate above 40% against a specific domain means you're both bidding on largely the same search terms. If their Position Above Rate against you sits above 60%, they're consistently outranking you on the exact same auctions. That's your priority competitor, not the one with the biggest logo.
Common mistake: reading Auction Insights once and never again. Pull it monthly. A competitor's Overlap Rate can jump from 15% to 55% in six weeks if they've just launched a new campaign.
2. Map their keywords and ad copy with a research tool
Auction Insights tells you who you're up against. It doesn't tell you what they're saying or which keywords they're chasing outside the ones you already bid on.
Run the competitor's domain through SEMrush's Advertising Research or SpyFu's PPC Keywords report. You'll get an estimated keyword list, sample ad copy, and a rough monthly traffic figure. Treat the traffic number as directional, these tools estimate from panel data, not real Google Ads accounts.
What's useful and reliable: the actual headline and description text they're running. If four of five competitors lead with "free quote" and none mention turnaround time, that's a copy gap you can exploit. This is the same principle behind how you'd improve your ad copy for higher CTR generally, applied specifically against what's already in the market.
3. Search your own keywords in incognito mode
Tools give you historical estimates. A live incognito search from a Johannesburg or Cape Town IP shows you the auction as it stands today.
Search your five highest-intent keywords in an incognito browser window. Note every advertiser in positions one through four, their headline, their displayed extensions (sitelinks, callouts, price extensions), and whether they're running a promotion. Do this at three different times of day, morning, lunch, evening, because some competitors dayparts their budget and disappears from the auction by 6pm.
Common mistake: searching once from a logged-in Google account. Personalisation skews results. Always use incognito, logged out.
4. Check what happens after the click
Click through to each competitor's landing page (from incognito, so you don't inflate their metrics through repeated ad clicks from a logged-in account tied to your business).
Look for three things: does the page match the ad's promise exactly, is there a clear single call to action above the fold, and is there any visible trust signal (reviews, case numbers, guarantees). A shocking number of South African advertisers in 2026 are still sending Google Ads traffic to a generic homepage instead of a dedicated landing page. That's a conversion rate leak you can exploit by building a tighter page for the same keyword.
5. Estimate their spend level from bidding behaviour, not tool guesses
Spy tools will give you an "estimated ad spend" figure. Ignore it as gospel, but use the underlying signal.
If a competitor shows up in every single search across all three of your daypart checks, on every device, with Top of Page Rate above 80% in Auction Insights, they're running a well-funded, always-on campaign, likely R15,000 to R50,000+ a month depending on the keyword set's typical CPC. If they appear intermittently, they're probably running a fixed daily budget that runs out by early afternoon. That tells you when the auction opens up for you.
Get your Auction Insights reviewed properly
A trained eye finds the overlap and CPC leaks a dashboard glance misses.
6. Build your differentiation into copy and bidding, not just observation
Competitor analysis that stays in a spreadsheet is wasted effort. Every gap you find needs to change something in your account within the week.
If competitors all skip price transparency, test a headline with an actual starting price or "from R X". If their landing pages are slow (test with PageSpeed Insights) and yours loads under two seconds, say so in a callout extension. If their Overlap Rate against you concentrates on branded-adjacent terms, consider whether you need a defensive campaign or whether that budget is better spent expanding into the keywords they're ignoring entirely, a tactic that also matters when you're trying to reduce your Google Ads cost per click by avoiding head-to-head auctions.
7. Set a recurring review, not a one-time audit
Auction dynamics in South Africa shift with the seasons, load shedding stage announcements, and school holidays affecting service businesses. A competitor analysis done in January 2026 is stale by the September 2026 trading period.
Block 45 minutes on the same day each month. Re-pull Auction Insights, re-run one incognito search sweep, and update your tracking sheet. This is also the moment to re-check anyone running Performance Max, since PMax competitors don't show up cleanly in standard Auction Insights and need a separate check through the account's asset group reports, something covered in more detail if you're weighing up Performance Max for South African SMEs.
Troubleshooting
Auction Insights shows "insufficient data" for a keyword. Your campaign needs meaningful impression volume before Google will populate the report. Broaden the date range to 90 days or wait until spend accumulates.
A competitor disappears from Auction Insights entirely one month. They've either paused the campaign, exhausted a fixed budget structure, or shifted to a different match type strategy. Don't assume they've left the market, check again in two weeks.
Spy tool traffic estimates don't match what you'd expect from a business that size. These tools model estimates from limited panel data and often misfire badly for smaller or newer domains. Cross-check with the incognito search sweep before trusting any single number.
Your Impression Share is climbing but conversions aren't. You might be winning more of an auction full of low-intent searches. Revisit your search terms report before blaming the competitor landscape.
You can't tell if a competitor is bidding on your brand name. Search your own brand term in incognito. If a competitor's ad appears above your organic or paid listing, that's a direct signal, and usually the first fire to put out.
Tools and resources
- Google Ads Auction Insights (built into every account, free)
- SEMrush Advertising Research or SpyFu PPC Keywords (paid, free tier available)
- Google's incognito browser mode for live SERP checks
- PageSpeed Insights for competitor landing page speed checks
- A shared spreadsheet logging Overlap Rate, Position Above Rate, and copy angles by month
If lead generation is the actual goal behind this analysis, not just outranking rivals for the sake of it, it's worth reading how to generate leads with Google Ads in South Africa alongside your competitor findings. The two exercises feed each other directly.
What to do next
Once you've mapped the competitive landscape, the next practical move is deciding whether your current agency or in-house setup can act on the findings fast enough. If you're evaluating whether to bring in outside help, the breakdown of the best Google Ads agencies in South Africa covers what a properly run account should look like month to month, which is a useful benchmark against whatever you find in your own Auction Insights report.
FAQ
What is a Google Ads competitor analysis?
It’s the process of reviewing which businesses you’re bidding against in the same auctions, what their ad copy says, and where your impression share overlaps with theirs. Auction Insights inside Google Ads is the primary data source, with third-party tools filling in keyword and copy detail Google doesn’t disclose.
How often should I run a Google Ads competitor analysis?
Monthly at minimum, quarterly at an absolute minimum if budget is tight. Auction dynamics in South Africa shift with seasonal demand and competitor budget cycles, so a check done in early 2026 can be outdated by mid-year.
Is SEMrush or SpyFu accurate for competitor ad spend?
No, treat their spend and traffic figures as rough estimates, not fact. They’re useful for surfacing keyword lists and actual ad copy text, which is far more reliable than their modelled traffic numbers.
What does high Overlap Rate in Auction Insights mean?
An Overlap Rate above 40% against a specific competitor means you’re both bidding on largely the same set of search terms. It flags your genuine head-to-head rival, as opposed to a business that just looks similar on paper.
Can I see a competitor’s exact Google Ads budget?
No, Google never discloses another advertiser’s actual spend. You can infer a rough range from how consistently they appear across dayparts and their Top of Page Rate in Auction Insights, but it’s an estimate, not a fact.
Should I bid on my competitor’s brand name?
Only if you’ve confirmed through incognito search that they’re already bidding on yours, and only with a clear budget cap. Brand bidding wars tend to raise CPCs for both sides without proportionally increasing conversions.
How do I check if a competitor is running Performance Max?
Standard Auction Insights doesn’t cleanly separate PMax competitors from standard Search campaigns. Look for their presence across Display, YouTube and Shopping placements alongside Search to spot a PMax-driven strategy.
What’s the biggest mistake businesses make in competitor analysis?
Doing it once before launch and never again. Auction Insights data from January 2026 tells you nothing reliable about the competitive landscape by the third quarter of the same year.
One last thing
The most useful number in the entire process isn't impression share, it's Position Above Rate. A competitor with 70%+ Position Above Rate against you, sustained over 90 days, isn't an accident of bidding, it's a Quality Score and landing page advantage compounding every single auction. Fix your Quality Score before you touch your bids, or you'll just be paying more to lose the same race.
Related guides
- Reduce your Google Ads cost per click
- Improve your ad copy for higher CTR
- Performance Max for South African SMEs
- Generate leads with Google Ads in South Africa
- Best Google Ads agencies in South Africa
