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D3 Data Driven Decisions

Better results start with better questions.

We manage your paid media, find what drives performance, and act on it to improve your return.

What we do

Paid media with decision science behind it.

01

Paid media

Search, Shopping, video and paid social, planned as one programme, led by a founder with over a decade of in-house PPC at UK price comparison sites.

Read about paid media
Kelly criterion

Trusted by teams who value measurement.

Confused.comBSMAA Driving SchoolTraveline CymruBoxBrand ContentKeto-ProTC ConsultCorset StoryBearmach
Four European Search Awards 2025 trophies on a rock ledge above a valley in Bannau Brycheiniog

Slizza's four 2025 trophies on Bannau Brycheiniog. The story.

European Search Awards 2025

Five wins.
One silver.

From six shortlists at the European Search Awards 2025, for Slizza and Lilongwe Wildlife Trust. Best Use of AI in PPC was open to agencies of every size.

Every category, every year

Try the method

Is this change real?

Your conversion rate went up. Is that enough evidence to change the budget? The example is a landing page test most dashboards would call a win, up by half. Run the numbers and there is about an 80 percent chance it is real, which is not enough to act on. Put your own numbers in.

How it works

Each version gets a curve of plausible true rates, a Beta distribution, from its visitors and conversions. The tool draws from both curves twenty thousand times and counts how often the after version wins. It runs in your browser and nothing is sent anywhere. The maths, and the formulas it rests on.

Before
After

probability the after version really converts better

Work

Proof, not promises.

Bidding on what a booking is worth

The bidding now knows what each action is worth, so budget follows the bookings that pay. Bookings have grown, Everest Base Camp has stayed strong, and the newer treks and channels are building.

Read the case study

Current client2026

Granting wildlife a future

The Trust now spends its full grant, and can show which results came from search. The campaign won Best Use of Search, Third Sector / Not-for-Profit, Small at the European Search Awards 2025.

Read the case study

Best Use of Search, Third Sector / Not-for-Profit, SmallEuropean Search Awards 2025

Who you work with

Two people. No account hand-offs.

  • Kate Horsington

    Kate Horsington

    Founder and Managing Director. Award-winning PPC specialist; runs the media.

  • Luke Maggs

    Luke Maggs

    Director, analytics and decision science. Operational researcher; runs the analytics, modelling, AI and development.

To walk away with both a win in the ‘Best Low Budget’ category and a silver award in the ‘Health’ campaign category is beyond our wildest dreams. I cannot thank Kate enough for her hard work, determination, and sheer talent that made this campaign such a success.
Ellie Jerman, Traveline Cymru, after the European Search Awards 2022. The write-up.
About the two of us

How we work

Clarity first. Then controlled growth.

01

Week 1

Measure and prioritise

Tracking QA, attribution checks, an account teardown, and a short list of what to fix first.

02

Weeks 2 to 4

Build the engine

Restructure, tighten targeting, launch the first creative and landing page tests, reporting you can decide from.

03

Ongoing

Run the rhythm

A weekly review, a monthly roadmap, budget moves on evidence, and a quarterly reset.

Next step

Not sure what is holding performance back?

Get in touch. We will ask a few sharp questions and tell you what we would look at first. No deck, no sales script.