Google today announced a new “standalone product token,” Google-Extended, that lets you control whether Bard and Vertex AI can access the content on your site. Vertex AI is Google’s machine learning platform for building and deploying generative AI-powered search and chat applications. In a blog post, Google said:“Today we’re announcing Google-Extended, a new control that web publishers can use to manage whether their sites help improve Bard and Vertex AI generative APIs, including future generations of models that power those products. However, as AI applications expand, web publishers will face the increasing complexity of managing different uses at scale.”Robots.txt. You can use robots.txt to block Google-Extended from accessing your content, or parts of it.