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High impact Sistrix Update May 26, 2026

May 2026 Core Update: Visibility Analysis and Data Updates

The May 2026 Core Update was announced on 21st May 2026, following the March Core Update. It was completed on the 2nd June. Data, analysis, examples and rankings for affected domains are shown below…

Ranking & Algorithms

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Medium Sistrix Jun 1, 2026

ChatGPT Core Updates: Chatbots Have Algorithm Changes Too

Everyone in SEO knows Google Core Updates: overnight, the visibility of domains shifts. Our data now shows the same pattern in ChatGPT. On May 23, 2026, the switch from GPT-5 mini to GPT-5.5 shifted…

Ranking & Algorithms

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Medium Lumar Update May 27, 2026