Half the businesses paying for Google Ads shouldn't be. Not because the platform is broken. It's the best demand-capture tool ever built. They shouldn't be there because their business doesn't match what Google Ads is actually good at. Here's how to figure out which side of the line you're on, before you spend a dollar.
What Google Ads is actually good at
Google Ads is a demand-capture machine. It does one thing exceptionally well: it puts you in front of people who are already searching for what you sell, at the exact moment they're searching for it.
That's a very specific superpower. It's not good at creating demand that doesn't already exist. It's not good at building a brand from zero. It's not good at impulse purchases or category-creation plays.
The rule of thumb: if your customers Google your service before buying, you're in scope. If they don't, you're not.
The four checks
Run your business through these four questions. If you fail any of them, Google Ads will burn money no matter how good the agency running it is.
1. Does anyone actually search for what you sell?
The most-skipped question, and the one that kills more accounts than anything else.
Quick test: open Google's Keyword Planner (free with any Google Ads account) and type the 5–10 phrases a customer would use to find you. If volumes are low or zero, the platform can't help you. People can't click on ads for searches that aren't happening.
If your category is new, niche, or unsexy enough that no one's actively searching, your money is better spent on Meta or content, where you can interrupt and educate instead of intercepting existing demand.
2. Do they search in your service area?
National-brand thinking forgets this is location-gated. A local roofer in Geelong needs people searching from Geelong (or nearby). Search volume in the wider state or country is irrelevant.
If you're hyper-local and your immediate service area has thin search volume, the math gets hard fast. You can spread the targeting wider, but conversion rates collapse when people realise you're not local to them.
3. Is your customer lifetime value high enough?
Rough rule: your customer lifetime value (LTV) needs to be at least 3× the cost it takes to acquire them. In paid search, where competitive industries push cost-per-click into the $20–$100+ range, that means low-LTV businesses get squeezed out fast.
A $200 service in a competitive market with $30 CPCs and a 3% conversion rate means you'll spend roughly $1,000 to land each customer. The math doesn't work.
This isn't a Google Ads problem. It's a unit-economics problem that Google Ads exposes very quickly.
4. Can your website actually convert the click?
Google Ads sends qualified, ready-to-buy traffic. If that traffic lands on a website that confuses them, asks for too much, loads slowly, or doesn't match what they were promised, you've paid for a click and converted nothing.
If your current website's conversion rate is under 2% and you don't know why, fix that before turning on ads. (Or fix it as part of the same project, but don't ignore it.)
When Google Ads is the obvious answer
All four checks pass:
- Real search volume in your category
- Volume in the area you can service
- An LTV that supports paid acquisition
- A website built to convert
Add to that: you sell a service or product the buyer actively shops for, has options to compare, and makes the decision online. That's the sweet spot. Google Ads will probably be your single highest-leverage channel.
When it's the wrong answer
No one searches for what you sell. You're trying to build category awareness. Your LTV is too low to support paid competition. Your business runs almost entirely on referrals and word of mouth, and that's a feature, not a bug.
In those cases the money is better spent on content, Meta, partnerships, or doubling down on whatever's already working.
The cheapest way to find out: don't commit a full quarterly budget to find out. Run a 30-day diagnostic: small budget, narrow keyword set, single landing page. You'll know in four weeks whether the platform pulls for your business or doesn't. If it does, scale. If it doesn't, you're out a few thousand dollars instead of a quarter's worth of spend.