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Solution · Lower ad costs Stop paying for clicks that don’t deliver.

Ad budget is often spread evenly across your whole catalogue, and you pay for loyal customers again with every purchase. With budget per product and your own channel to your customers , your money goes to what actually sells.

We know the technologies and help you choose what fits. We start with where your budget goes today.

1 · Analysis per productGA4, Google Ads and Meta · Boostic2 · Budget to your winnersThrough labels in your product feed3 · Rich data in your feedTitles and attributes · Fozzels4 · Loyal customers via pushNo click costs · Reskyt More revenue per euro from the same ad budget

What is ROAS?

ROAS (return on ad spend) is the revenue you get back for every euro of ad budget. A ROAS of 4 means €4 in revenue per €1 spent on ads. Online stores lower their ad costs by shifting budget to products that sell, and by reaching loyal customers through their own channels instead of paid clicks.

Lower ad costs don’t mean advertising less, but advertising smarter: every euro going to products and customers that deliver. Growth Sharks helps online stores choose between budget per product, better product data and their own channel, such as a shopping app.

What
More revenue per ad euro
Measured with
ROAS and margin per product
Channels
Google Shopping, Performance Max, Meta
Technologies
Boostic, Reskyt, Fozzels
Works best for
Large catalogue, monthly budget
First step
A diagnosis of your catalogue

Last updated on 10 November 2026 by Raymond Vonk, co-founder of Growth Sharks.

Where is your ad budget leaking?

Budget on products that don’t sell

Clicks on products that never sell still cost money. If 15% of €10,000 a month goes there, that’s €18,000 a year.

You buy loyal customers again

A customer who has bought from you before often comes back through an ad. Then you pay again for someone you already knew.

Thin product data in your feed

With incomplete titles and empty attributes, your products match search queries less well, and you compete on price instead of relevance.

Three technologies that make your ad budget pay off

Boostic steers the budget. Reskyt and Fozzels make sure you need less of it.

Ad budget per product Boostic Analyses what ads deliver for each product and adds labels to your feed, so budget goes to your winners. Choose this if you advertise every month through Google Shopping, Performance Max or Meta. From €599 a month. View Boostic → Shopping app Reskyt Your own channel to loyal customers: a push notification costs nothing per message, a click does. Choose this if you win a lot of repeat purchases through ads. Fixed annual licence from €4,999. View Reskyt → AI product content Fozzels Complete titles, attributes and descriptions in your product feed, so your products match search queries better. Choose this if your feed has thin or incomplete product data. From €299 a month. View Fozzels →
+15–30%
According to Boostic, customers achieve 15 to 30% better ROAS, and marketers save more than 10 hours a week on reporting.
Source: boostic.cloud, checked on 2 November 2026 · view Boostic

Around Christmas (25 December), online stores spend the most on ads. Make sure every euro goes to products that sell.

Which approach fits your online store?

Does this sound familiar?Then this helpsTechnology
You don’t know which products eat your budgetAnalysis and budget per productBoostic → Loyal customers come back through paid adsYour own channel with push notificationsReskyt → Your feed has thin titles and few attributesRich product data, automaticallyFozzels → Your marketer loses hours to reportingOne dashboard for GA4, Ads and MetaBoostic → You don’t know yet where your budget is leakingA conversation about your numbers, and adviceGrowth Sharks →

From the Knowledge base: ad costs

Go to the Knowledge base →
Term ROAS Knowledge base · Terms Term Custom label Knowledge base · Terms Term Product feed Knowledge base · Terms

Frequently asked questions about ad costs

What is ROAS?

ROAS stands for return on ad spend: the revenue you get back for every euro of ad budget. You calculate it as ad revenue divided by ad costs. €8,000 in revenue from a €2,000 budget is a ROAS of 4. Look at your margin as well, because a high ROAS on low-margin products can still mean a loss.

What is a good ROAS for an online store?

That depends on your margin. Your break-even ROAS is 1 divided by your gross margin. With a 50% gross margin you only make money above a ROAS of 2, with a 25% margin only above 4. Anything above that is profit, anything below costs you money.

How do I lower my ad costs without losing revenue?

By shifting budget rather than cutting it. Take budget away from products that get clicks but don’t sell, and put it on your best performers. Reach loyal customers through your own channels, such as an app or email, and improve your product feed so your ads match better.

What are custom labels in Google Shopping?

Custom labels are extra fields in your product feed that let you group products in your campaigns, for example by margin, return or season. You can then set a different bid or budget for each group. Boostic fills these labels automatically based on what each product delivers.

Why does my Performance Max budget go to the wrong products?

Performance Max spreads your budget across channels and products by itself, optimising for the goals you set. Without guidance, budget often goes to products that get lots of clicks, not to those with the best margin. Labels in your product feed give the campaign that guidance back.

Does a shopping app help reduce ad costs?

Yes, for loyal customers. A push notification to your app users costs nothing per message, while you have to pay for the same customer again through an ad. The more repeat purchases go through the app, the less budget you need to win them.

Which technology fits my online store?

If you advertise every month through Google Shopping, Performance Max or Meta, start with the split per product. If many customers come back through ads, your own channel delivers more. If your feed is thin, richer product data helps. In 30 minutes we work it out together.

What does Growth Sharks’ advice cost?

Nothing. Growth Sharks charges online stores no consultancy fees. We work with commercial agreements with the technology companies themselves. You sign the contract for the technology you choose directly with the vendor.

Where does your ad budget go?

In 30 minutes we look together at your campaigns and your catalogue. You get advice on where the biggest gains are.

Book a 30-minute call