Google Ads for ecommerce in Australia works when your product feed is clean, your tracking reports real revenue, and your bids follow profit margin. It drains money when Performance Max runs unsupervised, brand searches get credited as new sales, and low-margin products soak up the budget. Fix those problems before you raise spend.
Most online stores we audit don’t have a traffic problem. The clicks arrive. The profit doesn’t. A store can show a 4x return on ad spend inside Google Ads and still lose money once product cost, freight and returns come out. We’ve seen that gap more than once, and the owner usually found out months late.
This guide covers what we’d set up first in an Australian ecommerce account, what we’d switch off, and how to tell which situation you’re in.
What makes Google Ads for ecommerce in Australia different?
Google Ads for ecommerce is paid advertising that puts your products in front of people searching on Google, mainly through Shopping ads, Performance Max, Search campaigns and remarketing.
Australia has about 27 million people, so auctions are smaller than in the US or UK. Amazon Australia, eBay and Kogan bid on the same product searches you do. Shipping distances are long. And the seasons run backwards compared with most advertising advice written in the northern hemisphere: a winter coat sells in May, not November.
Here’s how the main campaign types compare for a typical online store:
| Campaign type | Best for | Main risk |
| Shopping | Stores with a clean feed that want query-level control | Narrow reach, manual upkeep |
| Performance Max | Scaling once tracking can be trusted | Spends on low-margin products and brand terms |
| Search | Brand terms and high-intent category keywords | Broad match pulling in junk queries |
| Remarketing | Winning back cart abandoners | Paying to chase people who’d have bought anyway |
What works: five habits of profitable Australian stores
1. Treat the product feed as the campaign
In Shopping and Performance Max, your Google Merchant Center feed decides which searches your products appear for. A title like “Throw Blanket” gives Google almost nothing. “Linen Throw Blanket, Charcoal, 130 x 170 cm” gives it something to match. One 2026 retail guide from Shopappy estimates that 70 to 80 percent of Performance Max retail spend lands on feed-driven placements, which is why a weak feed caps results no matter how good your creative is.
Some checks that matter specifically in Australia:
- Prices in the feed must match checkout prices, GST included. A mismatch gets products disapproved.
- Shipping settings should reflect your real Australia Post or courier rates, including remote postcodes in WA and the NT.
- Branded products need valid GTINs. Reusing one GTIN across different products is a common reason listings lose ground.
- Open Merchant Center diagnostics every week. Disapproved products can sit unnoticed for months.
2. Track revenue, not just conversions
Set up GA4 and Google Ads conversion tracking so every purchase passes its actual order value. Turn on enhanced conversions to recover sales that cookie limits would otherwise hide. Then, once a month, compare what Google Ads reports against orders in Shopify or WooCommerce.
Our rule of thumb: if the two differ by more than about 10 to 15 percent, fix tracking before touching a single bid. Smart Bidding learns from the data you feed it. Feed it bad numbers and it optimises toward them with great confidence.
3. Bid to break-even, not to a hunch
Break-even ROAS is 1 divided by your margin after product cost, shipping and payment fees. Say you sell a $90 item and $36 is left after those costs. That’s a 40 percent margin, so break-even ROAS is 2.5. At 3.0 you make about 20 cents on every ad dollar. At 2.0 you’re paying to sell.
Plenty of owners set their target ROAS from a competitor’s blog post. Your margin is the only number that counts.
4. Split by margin and protect your brand
Use custom labels in Merchant Center to tag products by margin tier, then give each tier its own budget or asset group. Run branded Search as a separate campaign, and add brand exclusions inside Performance Max so it stops bidding on your own name. Google made brand exclusion lists available in 2024, and a lot of accounts still haven’t switched them on.
The cost of skipping this is real. A 2026 audit of 50 ecommerce Google Ads accounts by the UK agency Jude Luxe, each spending £15,000 or more a month, found about 43 percent of Performance Max spend going to products in the bottom two margin quintiles. The median account had around £4,200 a month in recoverable waste. That’s UK data, but Performance Max behaves the same way in an Australian account.
5. Plan around the Australian calendar
EOFY sales finish on 30 June. Click Frenzy, Black Friday, Cyber Monday and Boxing Day each bring a spike, and search demand moves weeks before the sale date itself. Ramp budgets two to three weeks early so bidding has time to adjust.
Seasonal products flip too. Swimwear and outdoor furniture climb from September. Heaters and boots peak in autumn. And check stock before you scale: ads sending people to sold-out pages burn budget fast.
What drains your budget
Performance Max with no supervision
Performance Max does its best work with enough conversion data to learn from. Industry guidance suggests roughly 30 conversions a month per campaign. If your store makes 25 sales a month and you’ve split budget across four campaigns, each one starves.
Consolidate first. Split later, when volume justifies it.
Brand searches counted as wins
When Performance Max shows an ad to someone who typed your store name, the sale gets credited to the campaign. That person was already coming. Your ROAS looks excellent while new-customer numbers stay flat.
Judge Google Ads against total store revenue, not only against Google’s own report.
Broad match with no negatives
Open the search terms report every week. Add negatives for words like “free”, “jobs”, “repair” and “second hand”. It’s dull work, and it’s often where the first 10 percent of recoverable waste hides.
Selling what’s expensive to ship
A bulky $60 item going to Perth from a Melbourne warehouse can lose money before the ad cost is even counted. If freight and returns eat your margin, exclude those products or raise the price.
Reading Google Ads in isolation
Add one more metric: marketing efficiency ratio (MER), which is total revenue divided by total ad spend across every channel. If Google Ads ROAS climbs while MER falls, you’re probably taking credit for sales from email, organic search or direct visits. Strong ecommerce SEO lowers your reliance on paid clicks over time, so the two work best together.
How much budget does an Australian online store need?
Enough to give the bidding system around 30 purchases a month. Here’s an illustrative calculation, with assumptions you should replace using your own numbers.
At a 1.5 percent conversion rate, 30 sales need about 2,000 clicks. At an average cost per click of $1.20, that’s roughly $2,400 a month. Furniture, electronics and supplements often cost more per click. Low-priced accessories can cost less. Check Keyword Planner for your category before you commit.
Smaller than that? Start with Shopping campaigns on your best-selling, highest-margin products only. A narrow campaign you can read beats a broad one you can’t.
A 30-day starting checklist
- Audit Merchant Center diagnostics and fix every disapproved product.
- Compare Google Ads revenue with actual store orders and correct tracking gaps.
- Work out break-even ROAS for each product group.
- Add brand exclusions to Performance Max and move brand terms into a separate Search campaign.
- Review search terms and add negatives.
- Check that product pages load fast on mobile. A slow page wastes the click you paid for, which is where good website development pays for itself.
Frequently asked questions
Is Performance Max or Shopping better for ecommerce?
Neither wins outright. Shopping gives you query-level control and suits smaller catalogues. Performance Max reaches more placements and suits stores with reliable tracking and enough monthly conversions. Many stores run both, with Shopping protecting best sellers.
What’s a good ROAS for ecommerce in Australia?
A good ROAS is any figure comfortably above your break-even ROAS. For a store with a 40 percent margin that’s above 2.5. There’s no universal benchmark because margins differ so much between categories.
How long before Google Ads results show up?
Expect a learning period of two to six weeks while bidding settles. Judge performance over a full month, not a few days, and avoid changing budgets or targets mid-learning.
Should I hire an agency or run Google Ads myself?
Run it yourself if spend is small and you have time to review reports weekly. Consider outside help once spend passes the point where a 10 percent waste problem costs more than a management fee. Our Google Ads management service starts with a review of your existing account.
Where to go from here
If you’re not sure whether your account is leaking budget, a second pair of eyes finds it faster than another month of guessing. Optirank has spent 14 years in digital marketing from our Melbourne office, and the team works in-house. Request a free ad account review and we’ll show you where spend is going and what we’d change first. More guides are on our blog.
