BBD Boom Increased Google Ads ROAS by 487%
increase in ROAS
reduction in cost per conversion
increase in conversion value, while spending less
The Problem
BBD Boom is one of the UK’s leading HubSpot Elite Partners, helping B2B companies get more from HubSpot across onboarding, CRM, integrations, web development and lead generation. Their growth depends on reaching the right decision-makers at the right moment - marketing managers and founders actively searching for HubSpot expertise.
They were running Google Ads to drive enquiries, but the account had been left on auto-apply meaning a lot of waste was happening. In October 2025, they were getting a return on ad spend of just 19.16%. Cost per conversion had reached £518.
The spend was going out. The results weren’t coming back.
The Solution
Decima’s approach starts with one principle: never waste marketing spend. Before touching a bid strategy or rewriting an ad, that means understanding precisely where the budget is leaking and why.
Report & Refine: We Started By Fixing Measurement
You can’t stop wasting spend until you can see where it’s going, so we began with a forensic audit of BBD Boom’s account. It identified exactly where the problems lay: budget being consumed by low-intent search terms unlikely to ever convert into HubSpot clients, conversion tracking that wasn’t accurately reflecting real enquiries, and a campaign structure that made it impossible to identify what was genuinely driving the pipeline.
The first fix was measurement. We rebuilt conversion tracking to capture genuine business outcomes, so that the signals flowing into Google’s algorithms reflected what was actually working rather than noise.
Interpret & Ideate: We Rebuilt The Account Around Their Ideal Customer
With clean data in place, we could finally see who was worth reaching and who wasn’t. Campaigns were restructured around BBD Boom’s ideal customer profile: tightening targeting, overhauling negative keyword lists to stop wasteful queries burning budget, and aligning ad copy to the specific pain points of B2B businesses searching for HubSpot support.
Do & Deliver: We Reallocated Budget To What Actually Worked
With wasted spend eliminated and the right foundations in place, budget was reallocated toward what the data showed was driving real results, and the account began compounding.
The Outcome
- 487% increase in ROAS from 19.16% to 112.52%
- 76% reduction in cost per conversion
- 322% increase in conversion value, while spending less
As a CMO I've worked with a lot of agencies, and the thing that stands out with Decima is how straightforward the relationship is. There are no hidden charges, no confusing reports full of metrics that don't mean anything to the business. Every month we get a clear view of ROAS, conversion value, and what's working - that's it.
The results have been brilliant at helping us grow our business and the relationship with Decima has been just as good. Proactive communication, clear monthly ROI reports, and they just get on with it. It genuinely feels like they care about our growth as much as we do.
Their favourite part of Decisive Marketing
Report & RefineEvery month we get a clear view of ROAS, conversion value, and what's working - that's it.