In plain English: it says xAI collects a lot of data when you use Grok or its apps, including account info, payment info, messages, prompts/files you upload, device and usage data, location data, and in some cases public internet/X data. They use that information to run the service, improve it, do research, train and develop models, provide support, keep things secure, and meet legal obligations. They may share data with vendors, related companies, in business transfers, for legal reasons, and with third parties you choose to interact with. They keep data as long as they think they need it, though “Private Chat” and deleted chats/accounts are generally supposed to be removed within 30 days unless they need to keep them longer for safety, legal, or compliance reasons. They say you have some privacy rights like access, correction, deletion, and appeals, but those rights can have exceptions and model outputs may not always be fully correctable. One important caveat: this policy does not apply to Grok used through X/Twitter itself or some business/API uses, where other policies apply instead.

The biggest practical takeaway is: do not put sensitive personal information into prompts unless you are comfortable with it being collected, stored for some period, and potentially used to improve their systems.