How do you choose a good digital marketing agency? A step-by-step guide

Choosing a digital marketing agency is a decision that can genuinely affect the future of your business. A good agency will not only deliver traffic to your site but help you reach concrete business goals – from sales growth to building brand awareness. So how do you approach the process without losing time, budget and patience?

1. Think about what you actually need

Before you start looking for an agency, it is worth pinning down your needs:

• Do you want to increase sales in your online store?
• Or is a strong social media presence what matters?
• Do you need one-off support (e.g. a campaign) or an ongoing partnership?

Agencies differ in their specialisations. Some focus on performance marketing, others on strategy, others still on SEO or branding. The choice should be driven by a specific goal, not by the offer alone.

2. Check experience and specialisation

A portfolio is not just a collection of attractive graphics or client logos. Pay attention to:

• Has the agency worked with companies in your industry?
• Which channels has it run (e.g. Meta Ads, Google Ads, SEO campaigns)?
• Does it have experience in the work you are interested in?

It is a good sign if an agency can speak the language of benefits: showing not just the activity but the results – sales growth, ROAS, a reduction in customer acquisition cost and so on.

Example (case study):

A home & decor e-commerce campaign run by an external agency delivered a 230% increase in sales in 4 months thanks to DPA campaigns, precise retargeting and an extensive Google Ads campaign structure.

3. Get to know the team and how they work

Working with an agency is not a one-off service. It is a relationship. Pay attention to:

• Does the agency provide a dedicated contact person?
• What does communication look like (regular status updates, reports, channels)?
• Did they present a concrete plan of action before issuing a quote?

A partnership built on process (briefing, strategy, execution, optimisation) has a far better chance of succeeding than chaotic "winging it".

4. Assess transparency and reporting

Too often agencies operate "in the dark" – the client does not know what is being done, what the results are or where the budget is going. A good agency:

• gives you access to the ad accounts and analytics,
• explains the results and metrics (e.g. ROAS, CTR, CAC),
• reports regularly on activity and recommendations.

Do not be afraid to ask about the campaign structure and access to the data – it is your money.

5. Gather opinions and compare several offers

Before you decide:

• look for reviews on Google and platforms like Clutch,
• ask for references or a short conversation with a current/former client,
• compare not just prices but above all the scope and the agency's approach.

A price of PLN 2,500 for a campaign may be high or low – it all depends on what it includes. Look at the structure of the offer: does it cover creatives, A/B tests, reporting, strategic oversight?

Example:

Two offers for the same service company: one at PLN 2,000 net, the other at PLN 3,800 net. They differed not only in the advertising channels but in the scope of testing, optimisation and the number of expert support hours. In practice the more expensive one proved more profitable given the ROAS achieved.

6. Avoid the most common mistakes

• Choosing an agency purely on how good its website looks
• Being swayed by a low price without checking the scope
• No precise brief or goals
• No contract or working without a schedule
• Ignoring communication and process

7. What should the offer contain?

• An analysis of the current situation and potential
• A proposal of channels and strategy
• The campaign scope and planned activity (e.g. number of creatives, ad sets)
• The model of cooperation and the reporting system
• Terms (contract duration, notice, account access)

8. Checklist: what to look out for

When choosing a marketing agency, check whether:

• You have clearly defined marketing and business goals
• The agency has experience in your industry or with similar projects
• You received a concrete plan of action before signing a contract
• You are guaranteed access to the ad accounts and analytics tools
• Communication with the agency is transparent and regular
• A dedicated specialist or team is assigned to you
• The offer contains a detailed scope of work and a schedule
• Results reporting is included
• You have compared the offer with other proposals on the market
• You know the notice terms and how flexible the cooperation is
• You have checked reviews, references and real examples of results
• The agency works on the basis of data and optimisation, not one-off activity

Choosing an agency is an investment – of money and of time. It is not worth rushing. The better prepared you are, the greater the chance you will find a partner who helps you scale your business rather than just "running campaigns".