WhatsApp explains that “We may use the information we receive from them, and they may use the information we share with them, to help operate, provide, improve, understand, customize, support, and market our Services and their offerings.” Business Standard notes that users who receive the in-app notification have to accept the changes by February 8 or face account deletion.
The information that WhatsApp shares includes account registration details like your phone number, transaction data, mobile device information, and IP address. Other information include “service-related information” and “information on how you interact with others (including businesses) when using our Services”. However, messages will remain encrypted.
As for what WhatsApp receives from others, the information ranges from phone numbers and names to user reports and, if “in accordance with applicable law”, interactions with businesses that use WhatsApp. WhatsApp also said that it may receive information from third-parties or Facebook Company products in instances like using the WhatsApp share button or when an app store provides “reports to help us diagnose and fix service issues”.