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A SISTRIX analysis of 3.8 million German-language ChatGPT responses found that citation patterns changed after ChatGPT began implementing GPT-5.5. The analysis, published by SISTRIX founder Johannes Beus, tracked 38 daily samples of 100,000 ChatGPT responses. SISTRIX compared citations in the four days before the change with the four days after it. The company describes the […]
Welcome to the week’s Pulse: This week’s updates touch rankings, the Search interface, AI Mode behavior, and Google’s guidance around AI agents. Google launched a core update, announced what it called the biggest upgrade to the Search box in over 25 years, released first-party AI Mode usage data, and sent mixed signals on llms.txt from […]
Google has begun rolling out the May 2026 core update, according to the Google Search Status Dashboard Google also announced the rollout on X through its Search Central account. The rollout may take up to two weeks to complete. Today we released the May 2026 core update. We’ll update our ranking release history page when […]
Welcome to the week’s Pulse: updates affect how links appear inside AI search results, which types of sites gained or lost visibility in the March core update, and how Google’s Preferred Sources feature works across new markets. Here’s what matters for you and your work. Google Adds More Links And Link Context To AI Search […]
An analysis from Amsive found that aggregators and user-generated content platforms lost US search visibility after Google’s March core update, while first-party brand sites, government domains, and content originators gained. Lily Ray of Amsive examined over 2,000 domains using SISTRIX Visibility Index data and categorized them with Google Product Taxonomy tags via the DataForSEO API. […]
Google updated its Search Central documentation to reflect that the Preferred Sources feature is now available in all languages supported by Google Search. The change clarifies global availability and introduces updated guidance for publishers looking to grow their audience through Top Stories. Preferred Sources Google’s Preferred Sources feature gives users a way to choose specific […]
Last September, Lily Ray asked Perplexity for the latest news on SEO and AI search. It told her, confidently, about the “September 2025 ‘Perspective’ Core Algorithm Update”; a Google update that, as she then wrote at length in “The AI Slop Loop,” didn’t exist. Google hasn’t named core updates in years. “Perspectives” was already a […]
Last year, after spending a few days at a work summit in Austria, I asked Perplexity for the latest news related to SEO and AI search. It responded with details about a supposed “September 2025 ‘Perspective’ Core Algorithm Update” that Google had just rolled out, emphasizing “deeper expertise” and “completion of the user journey.” It […]
Welcome to the week’s Pulse: updates affect when you can start analyzing core update performance, how much you can trust your impression data, and what Google’s CEO thinks AI will do to software security. Here’s what matters for you and your work. March 2026 Core Update Is Complete Google’s March 2026 core update finished rolling […]
A SISTRIX analysis of German search data found far more losers than winners after Google’s March core update. The analysis revealed 134 domains experiencing confirmed visibility losses and 32 with gains. SISTRIX determined these figures by examining 1,371 domains showing significant visibility changes, then applying filters such as a 52-week Visibility Index history, 30 days […]