What type of alert is designed to notify users of suspicious account activity, particularly on social networks?

Login alerts are specifically designed to inform users when their accounts have had suspicious login attempts or unusual activity. These alerts are crucial for users on social networks as they help in monitoring unauthorized access or any irregular behavior that could indicate a security breach. By enabling login alerts, users can receive notifications directly to their email or mobile device whenever there is a login from an unrecognized device or location. This immediate awareness allows users to take prompt action, such as securing their accounts by changing passwords or enabling additional security measures.

The other options do not specifically target suspicious account activity in social networks. Fraud alerts generally relate more to financial transactions, activity logs serve as records of past actions rather than real-time notifications, and security notifications can be broad, covering various types of security issues rather than focusing solely on login activity.