Case Study: Three Mobile (British telecom) achieves 71% lower CPA with Quantcast audience insights

Three Mobile adds audience insights to multi-channel media planning to gain results

Three is a British telecommunications and internet service provider that wanted to boost handset and SIM sales among a younger, tech‑savvy audience, setting an ambitious target cost per acquisition (CPA) of £38.

By spending just 72 minutes on the Quantcast Platform during Q4M—20% on setup and daily checks and 80% on weekly audience deep dives—Three used audience insights to shape multi‑channel media planning. The approach delivered actionable insights and drove performance well beyond expectations, achieving a CPA 71% below their £38 target.

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