What results does Growth Room achieve on Google Ads? A summary of our case studies

When a prospect asks us, "What do you actually achieve on Google Ads?", we prefer to answer with numbers rather than promises. At Growth Room, we manage Google Ads campaigns across a wide range of sectors: e-commerce, real estate, healthcare, B2B services, and online training. Every time, the same levers come into play: clean account structure, reliable conversion tracking, and management that goes beyond simple cost-per-click. In this article, we summarize our Google Ads results that speak for themselves, featuring real figures from our client cases.

Key takeaways

• On average, our Google Ads campaigns generate 32% more leads or sign-ups, with an 18% reduction in acquisition costs.
• For Déménager Facile, we generated 425 leads in 2 months with an average cost per lead of €29, which was reduced by a factor of 3 during the campaign.
• For Poiscaille (e-commerce), the cost per subscription on Google dropped from €77 to €6 in three months, with an overall acquisition cost reduced by a factor of 7.
• The right level of performance depends heavily on the sector: a ROAS of 2 in B2B services can be just as profitable as a ROAS of 14 in e-commerce with a small basket size.
• Our clients give us an average 9/10 customer satisfaction rating after 3 months of support, which reflects both the method and the results.

Average results from our Google Ads campaigns

Before diving into the details case by case, here are the metrics we track in aggregate across all our active Google Ads accounts:

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These averages inevitably mask differences between sectors, budgets, and sales cycles. That is precisely the purpose of this article: to show what this looks like in practice, account by account.

Déménager Facile: 425 leads in 2 months with a controlled cost per lead

This is one of the most illustrative cases, because the campaign relies 100% on Google Ads, with no other supporting channels. Déménager Facile is a platform for comparing moving quotes, with two distinct audiences: the general public and military personnel relocating (a niche market with its own specific codes).

Our method involved auditing the account and the competition, launching discovery campaigns to identify the highest-performing queries, and then segmenting campaigns by department (20 targeted departments) with ad groups localized by city. The military and general public audiences were handled separately, with messaging tailored to each.

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What moved the cost per lead the most wasn't a bidding trick, but segmentation. By treating two audiences with different intentions separately, we were able to refine the messaging and eliminate queries that were expensive without converting. You can find the full details of this campaign in our Déménager Facile case study.

Beyond B2B services: our Google Ads results by sector

The same type of method yields very different results depending on the sector, average order value, and account maturity. Here is an overview of other recent client cases:

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The Poiscaille case clearly illustrates what good configuration can produce in a short time: between November 2022 and January 2023, over 2,000 subscriptions were generated, with the cost per subscription on Google divided by nearly 13 in three months, driven by fine-tuned work on audiences and continuously tested creatives. The case The Sanctuary Group demonstrates the value of restructuring tracking before optimizing anything: across 6 brands and 8 studios, we had to overhaul conversions and build a dashboard before seeing qualified leads grow sustainably.

Why these results vary so much from one sector to another

We are often asked why a ROAS of 2 can be an excellent result for one client and a poor one for another. The answer comes down to three factors:

• Average order value: A ROAS of 2 on a €3,000 order generates much more margin than a ROAS of 10 on a €30 order.
• Sales cycle: In B2B services, part of the value is determined after the click, during the sales qualification process, not just within Google Ads.
• Account maturity: A newly launched account almost always starts with higher costs while the algorithm learns who is actually converting.

This is why we always recommend setting a cost per lead or ROAS target specific to each account, calculated based on the average order value and actual margin, rather than aiming for a generic figure. We detail this calculation method in our article on calculating target CPA on Google, Meta, and LinkedIn.

Our Google Ads method, in summary

• A complete audit of the existing account and the competition before any optimization, so we don't start from scratch on what is already working.
• A campaign structure based on search intent, geographic area, or audience type, rather than one single catch-all campaign.
• Reliable conversion tracking, connected to the CRM when relevant, to drive performance based on qualified leads rather than just clicks.
• Regular testing of audiences, bids, and creatives, using short cycles to quickly adjust what isn't working.
• Simple, shared reporting so the client tracks the same numbers we do, without any unnecessary jargon.

What Google Ads can do for your business

These results aren't isolated strokes of luck; they come from a method we have been applying and refining sector by sector for several years. Every account has its own specific constraints regarding advertising budget, sales cycles, and average order value, and it is precisely this adaptation work that makes the difference between a campaign that just runs and one that actually turns a profit. If you would like us to look at what a Google Ads strategy well-built could do for your business, book a meeting with one of our Google Ads experts.