In digital marketing, an affiliate is a party — an individual, a freelancer or a company — that promotes products or services of a third-party company, called the merchant or advertiser, and receives a commission when their promotional activity generates a measurable result. The result can be a sale, a sign-up, a download, a form submission or any other action agreed between the parties. The affiliate does not buy or resell the goods: they simply direct qualified traffic to the merchant’s site using a tracked link that allows each conversion to be attributed correctly.
The relationship between affiliate and merchant is governed by an affiliate contract and, in most cases, is managed through an affiliate platform or network. This technical infrastructure generates the tracked links, records clicks, verifies conversions and calculates commissions. Affiliate marketing is considered one of the oldest and most established forms of digital marketing: the model emerged in the late 1990s and has evolved over time to include programs managed directly by merchants and specialized networks that connect thousands of publishers with hundreds of advertisers.
How the affiliate model works
The basic mechanism is simple: the merchant provides a program with rules, commissions and promotional materials; the affiliate chooses how and where to promote the offer; the platform tracks the user’s journey and assigns the conversion to the correct affiliate. Payment follows different models depending on the advertiser’s goal.
Most common commission models
The most common model is cost per sale, often referred to by the acronym CPA (cost per acquisition): the affiliate receives a percentage of the order value or a fixed amount for each successful purchase. There is also cost per lead, where the commission is earned when the user leaves their details or requests a quote, and cost per click, which pays for simply sending traffic to the site. Some programs also offer recurring commissions, typical of subscription services, where the affiliate earns as long as the customer renews their plan.
Tracking and cookies
Conversion attribution relies on unique identifiers inserted in the affiliate link and on cookies or tracking parameters. The attribution window, i.e. the period within which a click can be associated with a conversion, varies from a few hours to several months depending on the program. Privacy and data protection regulations have made explicit user consent necessary for the use of many tracking tools, with significant consequences for performance measurement.
Who can become an affiliate
There is no single affiliate profile. Among the most common participants are content publishers, bloggers, comparison site owners, newsletter managers, creators active on social networks and paid traffic specialists. Each category adopts different strategies and targets different audience segments.
Affiliate platforms generally assess traffic quality, audience alignment with the offer and compliance with program rules. The merchant can accept or reject an affiliate’s application and can suspend the collaboration in case of non-compliant practices, such as the use of fraudulent traffic or the promotion of misleading content.
Affiliate, merchant and other roles compared
| Role | Main role | How they are paid | Financial risk |
|---|---|---|---|
| Affiliate | Promotes third-party products or services | Commission on the result achieved | Low: only pays the cost of traffic |
| Reseller | Buys and resells the goods | Margin between purchase and sale price | High: advances the cost of goods |
| Influencer | Communicates the brand to their audience | Fixed fee, often with sponsorship agreements | Varies based on the contract |
| Advertiser | Publishes paid ads | None: they pay the platform | High: invests without guaranteed results |
| Network manager | Connects affiliates and merchants | Share of generated commissions | Medium: depends on network volume |
Advantages and critical issues of the channel
For the merchant, affiliate marketing is an acquisition channel with variable cost: you pay only when a concrete result arrives, without advancing advertising budget. For the affiliate, the main advantage is the ability to monetize an existing audience without managing inventory, customer service or logistics. The model also encourages specialization: a publisher who knows a sector well can build quality content and earn above-average commissions.
The critical issues mainly concern transparency and trust. The public must be clearly informed when content contains affiliate links, as required by advertising and commercial practices regulations. On the technical side, the loss of tracking signals due to cookie restrictions can reduce attributed conversions and generate disputes between affiliate and merchant. Finally, competition on the most profitable programs is high and requires skills in analysis, content optimization and traffic management.
How to start an affiliate business
- Choose a niche or topic consistent with your audience and skills.
- Build a base of useful, original and up-to-date content capable of attracting organic or quality traffic.
- Select reliable affiliate programs, checking commissions, attribution cookies and contract terms.
- Register on the platform or network and obtain the merchant’s approval.
- Generate tracked links and insert them into content naturally and relevantly.
- Monitor performance with analytics tools, distinguishing clicks, conversions and approval rate.
- Optimize pages, titles and calls to action based on the data collected.
- Comply with transparency obligations and tax rules for income from affiliate activities.
Frequently asked questions about the affiliate
What does it mean to be an affiliate?
It means promoting products or services of a third-party company through tracked links and receiving a commission when the promotion produces an agreed result, such as a sale or a sign-up.
Do you need a VAT number to be an affiliate?
It depends on the volume and continuity of the activity. An occasional activity may fall under miscellaneous income, while a habitual and organized activity generally requires opening a tax position. It is always advisable to check with an accountant.
How much can you earn with affiliate marketing?
There is no guaranteed income or standard figure: earnings depend on the sector, the type of commission, traffic volume and the ability to convert. Many affiliates start with modest earnings and grow over time.
What is the difference between an affiliate and a sponsored content?
An affiliate is paid based on a measurable result, while sponsored content normally involves a fixed fee agreed in advance, regardless of the conversions generated.
How are commissions paid?
Commissions accrue in the affiliate platform and are paid according to the thresholds and deadlines set by the program, usually by bank transfer or another method indicated by the network. Timing can vary from a few weeks to a few months.
Can you promote multiple programs at the same time?
Yes, in most cases you can join multiple programs, as long as they do not conflict with each other and you comply with each merchant’s contract terms.
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Affiliate marketing network