In advertising, the effectiveness of an agency’s work is closely tied to the quality of the client relationship. When agencies are treated poorly, as suppliers to be managed rather than as partners to be led, the results are can often predictable: reduced commitment, higher staff turnover, poor quality of thinking and work, and ultimately less effective campaigns.
This reflects a wider misunderstanding of the difference between management and leadership. Within organisations, we champion leadership principles: empowering teams, coaching individuals, and creating environments where talent can thrive. Yet, when working with agencies, some advertisers default to transactional ‘supplier management’.
The most successful advertisers take a different approach. They embody the principle of Client as Coach.
Much like a sports coach who helps athletes perform at their peak by removing barriers and fostering motivation, strong clients recognise their role is to create the environment for their agency partners to perform best. They do not simply direct work; they create conditions where agencies can contribute fully and with their specialist expertise.
As Alexander Den Heijer observed: “Great leaders believe they work for their team, average leaders believe their team works for them.”
Two practices are essential in establishing this type of partnership:
- Clarifying the mission – ensuring the agency understands how its work contributes to the advertiser’s brand and business goals
- Creating psychological safety – enabling open dialogue, bold thinking, and the freedom to take creative risks
Once these foundations are in place, incremental improvements such as timely feedback, clear communication, attention to detail, can deliver significant cumulative gains. This reflects the principle of an “aggregation of marginal gains”: small, consistent improvements that together generate substantial performance impact.
Ultimately, the way clients lead their agencies determines the quality of the work produced. Organisations that embrace the Client as Coach mindset elevate not only the effectiveness of their campaigns but also the strength of their partnerships. Leadership, not management, is what unlocks the true potential of a high-performing agency collaboration.