CPM in marketing: what it is, how to calculate it and when to use it
Learn what CPM means in marketing, how to calculate it, when it makes sense to use it and why optimising conversion matters more than negotiating cost per...

A digital partner is not just another provider: it is a strategic ally that integrates into your company's operations to drive growth through data, technology and continuous optimisation. But choosing the right partner can make the difference between scaling your business or getting stuck.
In this complete guide we explain what a digital partner is, what functions it fulfils, how it differs from a freelancer or a traditional agency, how much it costs and what criteria to apply to choose the best one for your project.
A digital partner is a company or team specialising in acting as an extension of the client's team. It does not limit itself to executing tasks: it participates in the strategy, shares business objectives and contributes expert knowledge in areas such as digital analytics, CRO (conversion rate optimisation), UX, applied artificial intelligence and data visualisation.
The fundamental difference with a traditional provider is the level of involvement. While a provider delivers a service and moves on, a digital partner:
At Boost, we work as a digital partner for companies like Catalonia Hotels, Grandvalira and DogfyDiet, where the relationship goes far beyond one-off execution. The goal is always the same: to build relationships based on trust, transparency and measurable results.
The functions of a digital partner vary depending on their specialisation, but a well-rounded digital partner typically covers these areas:
A good digital partner combines these functions within a structured framework. If you want to go deeper into how this approach applies to conversion, we recommend reading our guide on what a CRO agency is and how to choose the best one.
One of the most common questions is how a digital partner differs from hiring a freelancer or a traditional agency. Each model has its advantages, but the differences are significant.
| Criterion | Freelancer | Traditional agency | Digital partner |
|---|---|---|---|
| Relationship | One-off, task-based | Project-based, with defined scope | Long-term, integrated into the team |
| Strategic involvement | Low -- executes what is asked | Medium -- proposes within the project | High -- co-creates the strategy |
| Specialisation | Individual, in 1-2 areas | Generalist multidisciplinary team | Team specialised in a vertical |
| Scalability | Limited by availability | Medium, with additional costs | High -- adapts to growth |
| Knowledge transfer | Rarely | Documentation at end of project | Continuous training of the internal team |
| Cost | Low per hour, variable | Medium-high per project | Medium -- predictable with retainer |
| Commitment to results | By deliverable | By project deliverable | By KPIs and business metrics |
A freelancer is ideal for very specific tasks and tight budgets. An agency works well for projects with a defined start and end. But if you are looking for continuous strategic support that impacts your business metrics, a digital partner is the most cost-effective option in the medium and long term.
The cost of a digital partner depends on the scope of services, business complexity and the chosen billing model. There are three main models:
The retainer model involves a fixed monthly fee covering a set number of hours or services. It is the most common model in digital partner relationships because it offers predictability for both parties.
Works for specific initiatives with a well-defined scope: an analytics audit, measurement plan implementation or a quarterly testing programme.
In this model, part of the digital partner's compensation is tied to the results they generate. It is less common but increasingly in demand.
The key is not to look for the cheapest digital partner, but the one offering the greatest return on investment. A partner who improves your conversion rate by 15% can generate a 10x ROI on their monthly cost.
We all know "it takes a long time to earn trust and very little to lose it", and in the digital environment this reality is amplified. These are the five keys we apply at Boost to build lasting relationships as a digital partner:
Being a good digital partner requires going beyond the data. It means diving into the client's industry, knowing their competition, understanding the challenges of their market and grasping the internal dynamics of their team.
This proactive research and analysis effort is what sets apart a digital partner offering generic solutions from one generating real business impact.
Transparent communication is the foundation of any solid relationship between a digital partner and their client. It is crucial to keep the team informed at every stage: sharing progress, but also obstacles and learnings from each experiment.
Transparency creates an environment of mutual trust that allows problems to be addressed proactively and solutions found together.
Every company has unique needs. A trusted digital partner adapts their methodology, tools and pace of work to the specific reality of each client. They do not apply templates or generic solutions.
This means a personalised approach to everything: from data collection and analysis to experiment prioritisation and results presentation.
A digital partner that creates dependency is not a good partner. Part of the value lies in educating the client's team so they understand and leverage available data. Regular training sessions, practical workshops and clear documentation are fundamental.
By empowering the internal team, the digital partner strengthens the relationship and enables the client to make more informed and strategic decisions. If you are interested in how data transforms decision-making, check our guide on data-driven marketing.
Solid relationships are built over time. A trusted digital partner commits for the long term, demonstrating continuous dedication to helping the client achieve their goals. This means evolving and adapting alongside the business as market needs change.
At Boost, our partnerships with companies like Catalonia Hotels and Grandvalira have been active for years, precisely because the commitment goes beyond the contract.
For startups, ecommerce and digital businesses where agility and efficiency are decisive, having a trusted digital partner can make the difference between scaling and stagnating.
The main benefits of working with a digital partner:
Choosing a digital partner is a strategic decision. These are the key criteria to ensure you make the right choice:
No. A digital partner complements the internal team, bringing specialisation and resources that are not always viable to have in-house. The goal is to reinforce the team's capabilities, not replace it. The best partnership relationships happen when the internal team and the digital partner work as a single unit.
It depends on the starting point and the scope of work. In CRO and analytics projects, initial results are usually seen between 2 and 4 months. However, the true impact of a digital partner is measured in the medium and long term, when optimisations accumulate and the internal team also improves its analytical capacity.
Absolutely. In fact, startups and SMEs are where a digital partner adds the most relative value, because it provides access to high-level expertise without the cost of hiring a complete team. The retainer model can be adapted to tighter budgets by starting with a reduced scope.
Through KPIs agreed at the start of the relationship. For a digital partner specialising in conversion, the typical metrics include: conversion rate, revenue per session, experimentation velocity (tests launched per month), test success rate and cumulative improvement in business metrics.
At Boost we specialise in CRO, digital analytics and data-driven experimentation. We work as a digital partner for companies like Catalonia Hotels, Grandvalira and DogfyDiet, with a 100% results-oriented approach to improving conversion and business metrics. Our model combines strategy, execution and knowledge transfer.
Looking for a digital partner who truly impacts your conversion metrics? Discover how we work at Boost and let us talk about how we can help you scale your business.
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