How to sell on marketplaces in 2026 — Complete 10-step guide

Selling on marketplaces (Amazon, Cdiscount, Fnac, Otto, Zalando, Bol.com) is no longer optional for any product brand serious about scale. But the gap between "having a Seller account" and "running a profitable marketplace business" is huge — and that's where most projects stall.

This pillar guide walks you through 10 actionable steps from product selection to European scale. Method, costs, tools, pitfalls — everything we wish someone had told us when we started.