How to Evaluate an Agency’s Case Studies Before You Hire Them

When you are choosing an agency, case studies are often one of the first things you review. They are meant to show how an agency thinks, how it works and what it delivers in practice.

The challenge is that not all case studies are equally useful. Some look strong on the surface but offer little insight into whether that agency can solve your specific problem. Knowing what to look for helps you move from uncertainty to a more confident decision.

Table of Contents

What a Strong Agency Case Study Actually Shows
Why Relevance Matters More Than Volume
What to Look for When Searching for Agency Case Studies
A Practical Example of What Good Coverage Looks Like
Questions to Ask When Reviewing Case Studies
The Role Case Studies Should Play in Your Decision
Agency Case Study FAQs
Making Case Studies Work for You

What a Strong Agency Case Study Actually Shows

A useful case study is not just a summary of results. It should explain how those results were achieved and whether the same approach could apply to your business.

The strongest examples tend to follow a clear structure.

1. A Defined Challenge That Feels Real

You should be able to understand the context immediately.

This might include:

• Entering a new market
• Launching a product or app
• Competing in a crowded category
• Reaching a specific audience

Specificity matters. It shows whether the agency has experience with challenges similar to yours.

2. A Clear Explanation of What Was Done Differently

This is where many case studies lack depth.

A strong case study explains:

• Why a strategy was chosen
• How audiences were identified
• The role of creative, media or creators
• How decisions were made during the campaign

The most useful examples show campaigns built around audience behaviour, where paid activity supports content that already performs well.

3. Evidence That Links Activity to Outcomes

Results are more meaningful when they connect back to the strategy.

Look for:

• Metrics tied to the original objective
• Performance against defined KPIs
• Indicators of efficiency, not just scale
• Evidence of optimisation

For example, improvements in conversion rate or cost efficiency are more useful when they are clearly linked to specific actions taken.

4. A Sense of How Performance Evolved

Strong case studies show progression, not just a final outcome.

This may include:

• Testing before scaling
• Iteration based on audience response
• Adjustments to creative or targeting
• Longer-term improvement

This reflects a learning-led approach rather than a one-off result.

Why Relevance Matters More Than Volume

A large number of case studies can look impressive, but relevance is more important.

Audience Alignment

You need to see examples that reflect your audience.

This could include:

• Families
• Professionals
• Younger audiences
• Global or local markets

Different audiences require different approaches to content and messaging.

Product and Category Understanding

Different products require different strategies.

It helps to look for examples that reflect:

• Similar buying behaviour
• Comparable levels of consideration
• Similar competitive environments

For example, subscription growth, ecommerce conversion and brand building all require different approaches.

End Goal Clarity

Before reviewing case studies, it helps to define your objective.

This might include:

• Awareness
• Engagement
• Consideration
• Conversion

Strong case studies clearly connect strategy and execution to one or more of these outcomes.

What to Look for When Searching for Agency Case Studies

Common searches include:

• Agency case studies in a specific industry
• Social media case studies for ecommerce
• Influencer campaigns for app installs
• Paid media campaigns for subscription growth

To address these effectively, case studies should show:

• A range of campaign objectives
• Experience across sectors
• Different content and creator approaches
• Full funnel delivery
• Work across multiple markets

Range is useful, but it should not come at the expense of depth.

A Practical Example of What Good Coverage Looks Like

Strong case studies often demonstrate how an agency applies a consistent approach across different scenarios.

This might include:

• App launches supported by creator-led content and paid media
• Subscription growth driven by targeted performance strategy
• Product launches built on real-life storytelling
• Ecommerce campaigns focused on conversion efficiency
• Organic strategies designed for long-term growth

These examples may span different audiences and regions, while maintaining a consistent approach based on audience behaviour.

Questions to Ask When Reviewing Case Studies

To evaluate case studies effectively, it helps to ask:

• Does this reflect a challenge similar to ours?
• Is it clear what the agency did and why?
• Are results linked to meaningful outcomes?
• Is there evidence of testing and iteration?
• Does this show experience with our audience or market?

If the answers are clear, the case study is more likely to be useful.

The Role Case Studies Should Play in Your Decision

Case studies should do more than show results.

They should help you understand:

• How those results were achieved
• Whether the approach is repeatable
• Whether it applies to your situation

Detailed and relevant examples can provide clarity before you begin discussions with an agency.

Less detailed or overly polished case studies may create uncertainty.

Agency Case Study FAQs

How do I find an agency with relevant case studies?
Focus on audience, product type and objective rather than industry labels alone. Look for examples that show adaptable thinking.

What should I look for before hiring an agency?
A clear explanation of the challenge, the approach and the results, along with evidence of how decisions were made.

How can I tell if an agency can deliver what I need?
Look for case studies that match your objective and show how performance was achieved.

Do case studies show full-service capability?
They should demonstrate how different elements such as content, creators and media work together.

Making Case Studies Work for You

Case studies are most useful when they are detailed, relevant and grounded in real behaviour.

They help you understand how an agency approaches problems and whether that approach fits your needs.

When used well, they provide a clearer picture of how strategy, execution and results connect.