This is a fake message and WhatsApp users are advised to not forward it to anyone. In a blog post, WhatsApp has reiterated that it does not share any user data with Facebook. The messaging app is end-to-end encrypted, so the company cannot access your chats, images, personal files, or any other private information. The service can’t track your calls.
End-to-end encryption basically means that your messages are secured with a lock, and only the receiver and sender have the special key needed to unlock and read them.
The company later clarified that the update will not change the end-to-end encryption of personal conversations, and only business conversation hosted with the app might be readable and used for advertising. “Messaging with businesses is different than messaging with your family or friends” and some “large businesses need to use hosting services to manage their communication,” WhatsApp said.
WhatsApp also reported that it will “clearly label conversations with businesses that are choosing to use hosting services from Facebook.” The company also gave a few months of time to users to understand the new terms.