The client side of the agency relationship
When an agency relationship underperforms, the conversation usually focuses on the agency: the work was not good enough, the team was not strong enough, the strategy was not right. Sometimes these assessments are accurate. More often, they are incomplete assessments of a situation where the client side of the relationship also contributed meaningfully to the underperformance.
Agency relationships are collaborative. The agency can only produce work as good as the brief it receives, the feedback it is given, and the access it has to the information it needs. An agency working with poor briefs, vague feedback, restricted access to the relevant stakeholders, and an unclear view of what success looks like will consistently underperform, regardless of its own capability. The capability gap that most agency reviews identify is real but partial: it is missing the client-side capability gap that sits on the other side of every brief and review cycle.
The brief as the foundation
The quality of every piece of agency work is constrained by the quality of the brief it was commissioned against. An agency team that receives a clear brief with a specific audience definition, a single desired outcome, relevant context, and a documented success criterion will produce better work than the same team receiving a vague brief about the same topic. Not because the team is different, but because the brief creates the conditions for good work rather than leaving the team to guess.
Investing in brief quality is the highest-leverage client-side improvement available in most agency relationships. A one-hour briefing conversation that produces a genuinely clear and complete brief will save two or three revision rounds downstream. A brief template that standardises the essential elements across all commissions builds the team's brief-writing capability over time and reduces the variation in quality between individual briefs.
The best agencies consistently say the same thing about their best client relationships: the briefs are clear, the feedback is specific, and the access to information is not filtered through layers of process. That is not about the agency. It is about the client.
Feedback that moves work forward
Feedback is the mechanism through which agency work improves over multiple drafts and over the course of the relationship. Feedback that is vague, contradictory, or arrives from too many sources simultaneously undermines that mechanism and produces revision cycles that cost time without reliably improving the work.
Useful feedback is specific about what is not working and why, referenced to the brief where possible. "The tone here is too formal for the audience we defined" is actionable feedback. "I am not sure this is quite right" is not. Consolidated feedback, assembled from all internal reviewers and presented as a single, prioritised set of comments, is more useful than the same volume of comments arriving from multiple stakeholders in multiple documents over several days.
Feedback that references the brief prevents the drift that happens when review rounds introduce requirements that were not in the original brief. When a stakeholder's comment asks for something that was not in the brief, acknowledging it as a brief change rather than a correction maintains the integrity of the original commission and allows the agency to assess whether the change is significant enough to affect timeline or cost.
The strategic relationship beyond the execution
The agency relationships that produce the most long-term value are the ones where the agency is treated as a strategic partner rather than a supplier. This means including the agency in conversations about the business's marketing strategy before the brief is written, not after. It means giving the agency access to the data and customer insight that would improve their work. It means asking for the agency's perspective on marketing challenges, not just commissioning execution against predetermined conclusions.
Agencies in strategic partnerships with clients consistently report that they do their best work in these relationships because they have the context to make better decisions on their client's behalf. The commercial benefit accrues to both sides: the agency produces better work and the client gets substantially more value from the same fee.
The review cadence that maintains performance
A well-managed agency relationship includes a structured performance review at least twice a year: not a brief conversation about whether things are going well, but a substantive review of whether the work is achieving the objectives it was commissioned against, whether the agency's capability is matched to the current marketing priorities, and whether the commercial terms remain appropriate.
Between formal reviews, a monthly check-in that covers the strategic context, any upcoming brief changes, and the agency's perspective on opportunities or risks creates the communication rhythm that keeps both parties aligned and prevents the minor misalignments that accumulate into major relationship problems over time.
The relationship that improves with age
The best agency relationships get better over time because the agency accumulates contextual knowledge about the business that makes every brief they receive richer and every piece of work they produce more accurate. This contextual compounding is one of the most underappreciated benefits of long, well-managed agency relationships: the agency that has worked with a business for three years knows things about its positioning, its customers, its competitive context, and its internal dynamics that no new agency can replicate immediately. Protecting that knowledge by managing the relationship well is worth considerably more than the incremental cost saving from switching to a cheaper alternative.