Knowledge that makes you visible.
Current trends, honest takes, and practical tips on SEO and AI visibility, clearly explained.
PHP vulnerability PHP2Shell: What website owners need to do now
As of Oct 28, 2026: critical PHP flaws put millions of websites at risk. Who is affected, what to do today and why static websites are the safer choice.
Read the article →GPT-6 in ChatGPT: What changes for businesses now
GPT-6 has been in ChatGPT since October 2026. What Intelligent UI and the new web search mean for your visibility, and what to check now.
AI Visibility Tools Compared: What They Do, What They Cost and When They Pay Off
Which tools show whether ChatGPT, Gemini and Perplexity mention your brand? Otterly, Peec AI, Profound and more, with prices, a cost example and tips.
ChatGPT Ads in Europe: What Businesses Need to Know Now
Since late August, ChatGPT has been showing ads in Europe. How the ads work, who should test them and why being recommended in the answer remains the bigger lever.
Cookieless Tracking: My Website Without a Cookie Banner
No annoying cookie banner, still cleanly measured and GDPR-compliant. My field report on building ctseo.de without cookies, which tools are worth it and what it means for your conversions.
Do you show up in AI answers? Here is how to measure your AI visibility
On Google you can see your ranking, in AI answers you cannot. How to measure whether and for which questions ChatGPT, Gemini, and Perplexity name your brand, and what the numbers tell you.
When a Website Relaunch Is Really Worth It, and When It Is Not
A relaunch is expensive and risky. How to tell whether it is worth it, when a targeted update is enough, and how not to lose your visibility in the process.
When Search Starts on TikTok: What Social Search Means for Your Business
For more and more customers, search starts in a feed. What social search means and how you get found on TikTok, Instagram, and YouTube.
What ChatGPT Says About Your Business: How to Steer Your AI Reputation
More and more people ask AI about businesses. How to find out what ChatGPT says about you and steer your AI reputation.
When AI Agents Shop for Your Customers: How Your Business Gets Recommended
Your customers let AI research, compare, and preselect. How to make sure AI recommends your business.
Google AI Mode: What It Means for Your Business
Google Search is getting its biggest update with AI Mode. What it means for your visibility and inquiries, and how you get recommended in the AI answers.