All changes in the WhatsApp policy are described on the official website. It also says that the information that the service shares with Facebook companies includes account registration data (such as phone number), transaction data, service information, data on interactions with other users and companies, information about the device, IP address and more.
The transfer of user data should improve the delivery of personalized advertising, help make purchases and transactions, and improve the security, safety and integrity of all Facebook products.
The offer to accept the new terms appears automatically in mobile apps at launch. It cannot be rejected. All changes will take effect on February 8.