Did you read the next paragraphs? It literally describes the details. I would quote the parts that respond to your question, but I would be quoting the entire post.
> This confidential computing infrastructure, built on top of a Trusted Execution Environment (TEE), will make it possible for people to direct AI to process their requests — like summarizing unread WhatsApp threads or getting writing suggestions — in our secure and private cloud environment.
> This confidential computing infrastructure, built on top of a Trusted Execution Environment (TEE), will make it possible for people to direct AI to process their requests — like summarizing unread WhatsApp threads or getting writing suggestions — in our secure and private cloud environment.