MJ
Mariusz JagielskiAmazon Ads · Seller & Vendor EU
Amazon AdsCatalogue & ListingsA+ ContentAboutBlogContact
Blog

Knowledge without fluff

Practical articles on marketplace sales, e-commerce strategy, advertising and optimization.

Amazon
Amazon
12 min

How to start selling on Amazon.de — a complete guide

Step by step: from setting up the account to the first sale on the largest European marketplace. A practical guide for international sellers.

15 May 2025Read
Ads
Ads
8 min

ROAS vs ACoS — what should you really measure in PPC?

Most sellers optimize against the wrong metrics. I explain which indicators actually reflect campaign profitability.

03 May 2025Read
Allegro
Allegro
10 min

Allegro SEO — seven costly mistakes that cost you sales

An analysis of the most common listing optimization mistakes on Allegro and concrete ways to fix them.

22 April 2025Read
Automation
Automation
7 min

Marketplace repricing — when does it make sense?

Repricing tools, dynamic pricing, Buy Box strategy — an overview of repricing automation tools and strategies.

10 April 2025Read
Amazon
Amazon
9 min

Amazon A+ Content — how to create content that sells

A practical guide to creating Enhanced Brand Content and A+ Content that improves conversion and offer quality.

28 March 2025Read
Expansion
Expansion
15 min

Pan-European expansion — from strategy to execution

How to plan and carry out expansion into European markets. VAT, logistics, content localization.

12 March 2025Read
MJ
Mariusz Jagielski

Amazon Ads, catalogues, listings, A+ Content and sales analytics. I help brands and sellers grow profitable Amazon sales across Europe.

Mariusz Jagielski Doradztwo Marketplace

NIP: 6282087126 · REGON: 121366629

kontakt@mariuszjagielski.com
LinkedIn

Written cooperation in English · Remote worldwide

Other platforms — experience

AllegroKauflandeBayeMAGManoManoEmpik

Navigation

  • Home
  • Amazon Ads
  • About
  • Blog
  • Contact

Services

  • Amazon Ads
  • Amazon PPC Audit
  • Catalogue & Listings
  • A+ Content
  • Analytics & Profitability

© 2026 Mariusz Jagielski Doradztwo Marketplace. All rights reserved.

Privacy policyContact