How Affiliate Marketing Works

Last updated: 2026-08-19

Affiliate marketing means recommending a product and earning a commission when someone buys through your link. It is how review and comparison sites like SiteGrowth are funded.

Quick verdictAffiliate marketing is straightforward in concept but takes traffic and trust to be profitable — there are no shortcuts or guaranteed income.

How it works

You join a program, get a unique tracking link, and earn a commission when a purchase is attributed to your link. The merchant or network handles tracking and payment.

What you need to succeed

What SiteGrowth does

SiteGrowth reviews and compares software, and uses affiliate links as our business model. Our disclosure explains that we may earn a commission — and our recommendations are based on fit, not commissions.

What to avoid

Avoid fake reviews, urgency tricks, and promising guaranteed income. Ethical affiliate marketing is about genuinely helping people choose well.

Frequently Asked Questions

How much money can you make with affiliate marketing?

It varies widely and depends on traffic and conversions; treat any 'guaranteed income' claim as a red flag.

Do I need a big audience to start?

No — but you need some traffic channel (search, email, social) and content that matches buying intent.

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We may earn a commission if you buy through links on this page — at no extra cost to you.

Related reading

Some links on SiteGrowth are affiliate links. If you purchase through one of these links, we may earn a commission at no additional cost to you. Our recommendations are based on the fit of the tool for the use case, not simply on whether an affiliate relationship exists.