$1.8m incremental revenue boost with YouTube

Before using Fospha, River Island measured the performance of YouTube campaigns using a mix of in-platform metrics, geo-tests and twinned store analysis to evaluate campaign performance.

The result? The team found it difficult to capture the true value of the channel and to justify an always-on strategy, even though the team saw potential in the channel.

Approaching Q4, the team was tasked with strengthening upper-funnel activity by increasing awareness and consideration across key audience segments to influence purchase ahead of the peak trading period.

The Solution

Fospha’s full-funnel measurement revealed that YouTube was driving 254X more revenue than previously reported. The team at River Island harnessed these insights to:​

• Confidently scale YouTube spend by +500% YoY in Q4 2024 ahead of peak season​.
• Test campaigns by audience type and optimize based on Fospha’s ROAS insights​.
• Using Fospha’s Spend Strategist, identify that YouTube could scale a further +200% in Q4 without exceeding CPA targets​

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YouTube performed optimally at higher spend levels. In Q4, River Island saw impressive efficiency improvements in the channel year-over-year.

• 1271% increase in YouTube impressions
  
• 950% rise in YouTube revenue
• 72% increase in YouTube ROAS
• 43% better YouTube CPA

Upper-funnel expansion in Google

With proven results from YouTube, River Island launched Google Demand Gen in February 2025.

Just one month in, the channel exceeded expectations—beating CAC targets by 33% and ROAS targets by 120% in March. Fospha gave River Island the confidence and clarity to scale full-funnel channels profitably—turning YouTube and Demand Gen into key drivers of efficient growth.