Meta's core justification for data sharing is to improve its services, personalize experiences, combat spam/abuse, and develop new features, especially in the context of its broader family of apps (Facebook, Instagram, Messenger).
For ALL WhatsApp Users (even without Accounts Center linking):
Infrastructure Support: WhatsApp relies on Meta's infrastructure (servers, network) to deliver its service globally.
Security and Safety: Data is shared to help combat harmful cyprus phone number list conduct, protect users, detect spam/abuse, and ensure integrity across Meta's products. This includes identifying potentially fraudulent activities.
Measurement and Analytics: To understand how services are used, measure their effectiveness, and for reporting to Meta. This involves aggregated, non-personally identifiable data where possible, or hashed identifiers.
Service Delivery: To provide core functionalities and improve reliability.
Legal Compliance: To comply with legal obligations and respond to law enforcement requests.