This is where user choice directly impacts sharing

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This is a crucial purpose. Data is shared to help detect and combat harmful conduct, spam, fraud, and illegal activity across all of Meta's products. For example, if a spam bot is identified on Facebook, data sharing can help identify and neutralize related activity on WhatsApp. This involves security analytics and threat intelligence sharing.

Measurement and Analytics: To measure the effectiveness and usage of Meta's services across the family of apps, and to provide aggregated reporting.
Product Development and Improvement: To improve Meta's services, including WhatsApp, and to research and develop new features across the entire ecosystem.

Facilitating Business and Commerce: To enable and improve business argentina phone number list interactions and commerce experiences across Meta's family of apps (e.g., showing a WhatsApp button on a Facebook business page).

Providing Integrated Experiences (Accounts Center): . If you opt-in to Meta's Accounts Center, your WhatsApp account can be linked with your Facebook and/or Instagram accounts. This enables certain cross-app experiences (e.g., sharing WhatsApp Status to Instagram/Facebook Stories) and allows Meta to use shared data (like device information, usage logs, age information, and data about cross-posted content) to personalize content, suggestions, and ads on other Meta platforms (Facebook, Instagram). This is a explicit mechanism for data synergy across Meta's products.