OpenAI, Google, and Microsoft Bing are adopting a new robots.txt signal, __usage_ai-training, to allow website owners to express preferences about using their content for AI model training. This signal is intended as a preference, not a strict block, and is separate from existing crawler rules. While the standard is under development and expected to be supported by Google in early 2027, its adoption and enforcement by AI companies are not yet mandatory. AI
IMPACT This new standard aims to give website owners more control over how their content is used for AI training, potentially impacting future model development and data sourcing.
RANK_REASON Significant industry policy change with major tech companies adopting a new standard.
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