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Worth knowing.

Whatever I research, I share here for free. Laws that affect you as a merchant, AI explained in plain language and honest takes on markets and technology.

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Law & dutiesapplies from 12 August 2026

The new EU Packaging Regulation: what applies from 12 August 2026

The PPWR replaces the old packaging directive and applies directly in every EU country from 12 August 2026. For shipping merchants a lot changes, some of it now, some of it staged until 2030.

Updated: Aug 4, 2026·3 min readRead post

Law & dutiesin force since 2 August 2026

The AI Act in your shop: transparency duties since August 2026

The EU AI Act has been phasing in since 2025. Since 2 August 2026 the transparency duties apply, and they touch almost everyone who uses AI in customer contact.

Updated: Aug 4, 2026·3 min readRead post

Law & dutiesmandatory since 28 June 2025

Accessibility: mandatory since June 2025, now enforcement begins

The German Accessibility Act (BFSG) applies to online shops since 28 June 2025. Many sites still have not adapted, and 2026 brings the first inspections and warning letters.

Updated: Aug 4, 2026·3 min readRead post

Law & dutiesin force since 13 December 2024

Product safety (GPSR): what many merchants still get wrong

The Product Safety Regulation has applied since December 2024, yet many shops still miss manufacturer details and warnings in their listings. That is exactly what warning letters target.

Updated: Aug 4, 2026·3 min readRead post

Law & dutiesreceiving mandatory since 1 January 2025

E-invoicing: what you must handle today and what comes by 2028

Since 2025 every German business must be able to receive e-invoices. The duty to send them arrives staged in 2027 and 2028. A PDF, by the way, does not count.

Updated: Aug 4, 2026·3 min readRead post

Law & dutiesapplies from 27 September 2026

The end of climate neutral: these ad claims are banned from September 2026

Eco-friendly, climate neutral, sustainable: from 27 September 2026 such terms sit on the blacklist if the proof is missing. The EmpCo directive is transposed into German law, and the grace period is running out.

Updated: Aug 4, 2026·3 min readRead post

Law & dutiestransposition due 9 December 2026

New product liability: from late 2026 software is liable too

The EU has rewritten product liability law for the first time in almost 40 years. From 9 December 2026 software counts as a product, missing security updates become a liability case, and injured customers get easier access to evidence.

Updated: Aug 4, 2026·3 min readRead post

Understanding AI

What a language model really is

ChatGPT, Claude and friends look like they are thinking. In reality they predict the most likely continuation of a text, word by word. Once you understand that, you also know when to trust them and when not.

Updated: Aug 4, 2026·3 min readRead post

Understanding AI

AI in a small business: 5 uses that pay off right away

AI does not have to be a big project. These five uses work with the tools you already have and save time from the first week. Just as important: knowing where the effort is not worth it.

Updated: Aug 4, 2026·3 min readRead post

Understanding AI

AI agents and MCP: when AI does not just talk but works

A chatbot answers questions. An agent completes tasks: it plans steps, uses tools and keeps working until the goal is reached. One thing making this possible is MCP, an open standard that connects AI to your systems.

Updated: Aug 4, 2026·3 min readRead post

Understanding AIliteracy duty since 2 February 2025

I only use ChatGPT: the duties you still have

No AI product of your own, just ready-made tools in daily work: under the AI Act that makes you a deployer. Fewer duties than a provider has, but not zero.

Updated: Aug 4, 2026·3 min readRead post

Understanding AI

Your data and AI: what providers do with your inputs

Everything you type into an AI chat ends up on someone else’s servers. Whether it is also used for training depends mostly on your account type. The differences are bigger than many think.

Updated: Aug 4, 2026·3 min readRead post

Understanding AI

Prompts that work: patterns, not magic

Good AI results are not talent and not secret knowledge. They follow a pattern of four building blocks that you can learn in five minutes and reuse everywhere from then on.

Updated: Aug 4, 2026·3 min readRead post

Markets & economy

Marketplace or your own shop? Both, but with a plan

Marketplaces bring reach from day one, but they keep the customer relationship and part of the margin. Your own shop turns that around. The real question is not either or, it is what comes in which order.

Updated: Aug 4, 2026·4 min readRead post

Markets & economyin force since 1 July 2026

Temu, Shein and the customs reform: the end of the 150 euro limit

For years, billions of cheap parcels entered the EU largely unchecked and duty-free, while merchants inside the EU had to follow every rule. Since 1 July 2026 that is changing: the 150 euro exemption is gone.

Updated: Aug 4, 2026·4 min readRead post

Markets & economy

What software really costs: SaaS subscriptions versus custom software

At 49 euros a month, every tool looks harmless. The honest question is a different one: what does your toolbox cost over 3 years, with all subscriptions, user tiers and the manual work in between. That calculation often comes out surprising.

Updated: Aug 4, 2026·4 min readRead post

Markets & economy

The quiet rebuild of retail: how AI changes the buying decision

A growing share of buying decisions no longer starts with ten blue links but with an answer from an AI assistant. That quietly changes who gets found and who does not. Panic is unnecessary, preparation is not.

Updated: Aug 4, 2026·3 min readRead post

Tools & practice

APIs explained simply: what an interface is and when you need one

API sounds technical, but at its core it is an agreement: two programs pass data to each other in an arranged way. Here I explain the principle with an example from retail, no jargon required.

Updated: Aug 4, 2026·3 min readRead post

Tools & practice

Workflow automation: which processes are worth it first

Workflow automation rarely fails because of technology. It fails because the wrong processes get automated. Four criteria show you which tasks to start with, and a simple calculation shows why.

Updated: Aug 4, 2026·3 min readRead post

Tools & practice

Getting a website built: the checklist before you commit

I build websites for clients myself, so this post plays with open cards: what to clarify before you send an inquiry, which questions any good provider can answer and which offers to walk away from.

Updated: Aug 4, 2026·3 min readRead post