Managing external agencies in digital marketing | Lillian Purge

Managing external agencies in digital marketing

I have spent many years working in search engine optimisation and AI optimisation and I also run my own digital marketing firm. Over that time I have been on both sides of the table. I have been the agency delivering work and I have been the consultant brought in when relationships have broken down results have stalled or costs have spiralled without clarity.

If there is one thing I am confident about from experience it is this.

Most problems with external agencies are not caused by bad intent. They are caused by poor management unclear expectations and a lack of shared understanding about what success actually looks like.

In my opinion managing external agencies in digital marketing is a skill in its own right. It is not something that can be left to chance or handled casually alongside other responsibilities. When agencies are managed well they become genuine partners who accelerate growth. When they are managed poorly they become expensive black boxes that create frustration confusion and mistrust.

This article explains how to manage external agencies in digital marketing properly. Not from a textbook perspective but from real world experience of what works what fails and why. Everything here is grounded in UK practice and the realities of modern digital marketing.

Why external agencies are used in the first place

Before talking about management it is important to understand why businesses use external agencies.

From experience the reasons usually include lack of in house expertise lack of time need for specialist skills or the desire for fresh perspective. All of these are valid.

Digital marketing is complex and constantly changing. Expecting internal teams to master every channel tool and platform is unrealistic for most organisations.

Agencies exist to provide focus depth and execution.

Problems arise when businesses outsource responsibility rather than capability.

The difference between outsourcing work and outsourcing thinking

One of the most common mistakes I see is outsourcing thinking.

From experience businesses hire agencies and then step back entirely. Strategy decisions priorities and interpretations are left to the agency.

This creates imbalance.

Agencies should execute and advise. Strategic ownership should remain internal.

When thinking is outsourced accountability becomes blurred and decisions are harder to challenge.

Good agency management means staying intellectually engaged even if execution is external.

Why digital marketing agencies are hard to manage

Digital marketing agencies are difficult to manage because outcomes are not always immediate or linear.

From experience results take time fluctuate and depend on external platforms.

This makes it harder to judge performance compared to more tangible services.

It also allows vague reporting to hide underperformance.

Effective management requires understanding what should be happening beneath the surface not just looking at headline metrics.

The danger of hiring agencies based on promises

Many agency relationships start badly because of how they begin.

From experience agencies are often hired based on bold promises.

Guaranteed rankings instant leads or rapid growth.

These promises are appealing but rarely realistic.

Hiring based on promises rather than process is one of the fastest ways to create disappointment.

Strong agencies focus on method transparency and alignment not guarantees.

Defining what success actually means

One of the most important management steps is defining success clearly.

From experience many businesses cannot articulate what success looks like beyond vague ideas like more traffic or better visibility.

Success needs to be defined in business terms.

More qualified enquiries
Lower cost per acquisition
Better conversion rates
Improved brand recognition
Reduced reliance on paid platforms

Without clear success definitions agencies optimise for whatever metric makes them look good rather than what matters to the business.

Why KPIs must reflect intent not vanity

Vanity metrics are easy to report and easy to misinterpret.

From experience agencies often report impressions clicks followers or rankings because they look impressive.

These metrics do not always correlate with business outcomes.

Managing agencies effectively means focusing KPIs on intent and outcome.

Enquiry quality conversion rates pipeline contribution and assisted conversions matter far more.

Agencies should be accountable to these metrics.

The importance of shared language

Miscommunication is one of the biggest causes of agency conflict.

From experience businesses and agencies often use the same words to mean different things.

SEO content strategy performance and optimisation are common examples.

Agreeing definitions early prevents confusion.

Shared language creates shared understanding.

Why brief quality determines agency performance

Agencies can only deliver against the brief they are given.

From experience poor briefs lead to poor outcomes.

Briefs should include business context target audiences constraints success measures and non negotiables.

Vague briefs force agencies to make assumptions.

Those assumptions are rarely aligned perfectly with business reality.

The role of onboarding in agency success

Onboarding is often rushed.

From experience proper onboarding sets the tone for the entire relationship.

This includes sharing historical data previous agency experiences internal processes brand guidelines and commercial realities.

Agencies perform better when they understand the business deeply.

Skipping onboarding leads to shallow execution.

Why one point of contact is essential

Agency relationships break down when communication is fragmented.

From experience multiple stakeholders giving feedback creates confusion and delays.

One internal point of contact should own the relationship.

This person gathers feedback makes decisions and communicates clearly.

This does not mean acting alone. It means coordinating internally before engaging externally.

Understanding agency incentives

Agencies respond to incentives.

From experience agencies paid on activity focus on activity.

Agencies paid on outcomes focus on outcomes.

Where possible align incentives with results not just deliverables.

This may include performance bonuses retention based on results or phased contracts.

Incentive alignment reduces conflict.

Why transparency matters more than perfection

No agency gets everything right all the time.

From experience what matters most is transparency.

Agencies that are open about challenges delays and underperformance build trust.

Agencies that hide behind jargon or over polished reports do not.

As a client you should encourage honesty not punish it.

Transparency enables course correction.

How to read agency reports critically

Agency reports are often overwhelming.

From experience effective management requires knowing how to read between the lines.

Ask simple questions.

What changed since last month
Why did it change
What action was taken
What is planned next

If a report cannot answer these questions clearly it is not useful.

Reports should support decisions not impress stakeholders.

The risk of passive agency management

Passive management is one of the most expensive mistakes.

From experience businesses assume that no news is good news.

They pay invoices attend occasional calls and trust that work is happening.

Months later they realise nothing meaningful has changed.

Active management does not mean micromanagement. It means engagement.

Asking questions reviewing work and challenging assumptions is healthy.

Micromanagement versus accountability

There is a difference between micromanagement and accountability.

From experience micromanagement focuses on how tasks are done.

Accountability focuses on whether outcomes are achieved.

Telling agencies how to do their job undermines expertise.

Holding them accountable for results respects expertise.

This balance is crucial.

Why agencies should explain trade offs

Digital marketing involves trade offs.

From experience good agencies explain these openly.

Faster results may require higher spend. Lower cost may mean slower growth.

Hiding trade offs creates unrealistic expectations.

As a manager you should expect agencies to explain the consequences of decisions.

Managing multiple agencies at once

Many businesses work with multiple agencies.

From experience this increases complexity.

SEO PPC content and web development often sit with different providers.

Without coordination agencies may work against each other.

Clear ownership of strategy and regular cross agency communication prevents siloed decisions.

Someone internal must own the big picture.

The role of internal knowledge in agency management

You do not need to be an expert but you do need baseline knowledge.

From experience businesses that understand fundamentals manage agencies better.

This prevents being misled and improves collaboration.

Basic understanding of channels metrics and processes empowers better decision making.

When agencies should be challenged

Agencies should be challenged when results stagnate explanations are vague or recommendations conflict with business reality.

From experience respectful challenge improves outcomes.

Asking why something is recommended how success will be measured and what alternatives exist is healthy.

Avoiding challenge leads to complacency.

Red flags that indicate poor agency performance

Certain patterns appear consistently.

From experience red flags include constantly changing metrics lack of clear strategy defensive responses to questions poor documentation and inability to explain work simply.

One red flag does not mean failure but patterns matter.

Early intervention prevents long term damage.

The importance of documentation and decisions

Verbal agreements are easily forgotten.

From experience documenting decisions priorities and changes creates accountability.

This protects both sides.

Documentation reduces disputes and improves continuity especially when staff change.

How often to review agency performance

Performance should be reviewed regularly but not obsessively.

From experience monthly check ins with quarterly deeper reviews work well.

Daily or weekly scrutiny creates noise.

Reviews should focus on trends not individual data points.

Patience is required in many digital channels.

Why agencies fail when strategy is unclear

Agencies struggle when strategy is unclear.

From experience lack of clarity leads to scattergun execution.

Agencies deliver bits of work without cohesion.

Managing agencies effectively means providing strategic direction even if execution is outsourced.

Strategy is not optional.

Managing agencies during difficult periods

Markets change budgets tighten and priorities shift.

From experience how agencies are managed during difficult periods determines relationship strength.

Open communication about constraints allows agencies to adjust plans.

Sudden cuts without discussion damage trust.

Agencies are partners not vending machines.

Knowing when to change agencies

Not every agency relationship should be saved.

From experience if trust is broken transparency is lacking or alignment is gone change may be necessary.

Changing agencies is disruptive so it should be done deliberately not emotionally.

Clear evaluation criteria help make this decision rationally.

How to transition between agencies properly

Agency transitions are risky.

From experience poor handovers lead to data loss strategy gaps and performance drops.

Proper transition includes access transfer documentation sharing and overlap periods where possible.

Burning bridges rarely benefits the business.

Avoiding the agency carousel

Constantly switching agencies is a sign of deeper issues.

From experience businesses that jump from agency to agency often lack internal clarity.

Agencies are blamed for problems rooted in strategy or expectations.

Stability comes from alignment not constant change.

Managing agencies as an ongoing process

Agency management is not a one off task.

From experience it is an ongoing process that evolves with the business.

As goals change agency scope and KPIs should change too.

Static relationships become misaligned over time.

The role of leadership in agency management

Leadership sets the tone.

From experience when leadership is engaged agencies perform better.

When leadership disengages agency work loses priority internally.

Clear leadership involvement signals importance.

Managing agencies ethically

Ethics matter.

From experience agencies should not be pushed to cut corners mislead users or chase manipulative tactics.

Short term wins achieved unethically often lead to long term problems.

Managing agencies ethically protects brand reputation.

How AI and automation change agency management

AI tools are changing agency workflows.

From experience this increases efficiency but also opacity.

Agencies may use automation that clients do not understand.

Clear communication about tool usage ensures transparency.

Automation should enhance value not replace accountability.

Measuring long term value not just short term results

Digital marketing impact compounds.

From experience managing agencies purely on short term metrics undermines long term growth.

Balancing short term performance with long term brand and authority building leads to better outcomes.

Agency management should reflect this balance.

Building a partnership mindset

The best agency relationships feel like partnerships.

From experience this requires mutual respect shared goals and open communication.

Agencies who feel trusted invest more. Clients who feel informed trust more.

This dynamic produces the best work.

Common mistakes businesses make when managing agencies

Common mistakes include vague briefs unrealistic timelines lack of engagement chasing vanity metrics and avoiding difficult conversations.

From experience avoiding these mistakes improves results dramatically.

How to upskill internally without replacing agencies

Internal upskilling improves agency management.

From experience learning basics of channels metrics and tools helps ask better questions.

This does not mean replacing agencies.

It means becoming a better client.

Better clients get better results.

The cost of poor agency management

Poor management is expensive.

From experience it leads to wasted spend lost time missed opportunities and frustration.

Good agency management reduces risk and increases ROI.

The difference is significant.

Preparing for the future of agency relationships

Digital marketing continues to evolve.

From experience agency relationships will become more specialised.

Managing multiple partners effectively will become more important.

Strong governance and clarity will differentiate successful organisations.

Final reflections from experience

Having worked with many agencies and clients I genuinely believe that managing external agencies well is one of the most valuable skills a business can develop.

In my opinion the goal is not to control agencies but to collaborate with them effectively.

Clear expectations shared understanding accountability and trust transform agencies from cost centres into growth partners.

When agencies are managed well digital marketing becomes calmer more predictable and more aligned with business goals.

When they are managed poorly even the best agencies struggle.

Managing external agencies in digital marketing is not about authority.

It is about clarity.

And clarity is what ultimately drives results.