Account deactivation refers to the process of temporarily suspending a user's access to their account on a platform or service. This can occur for various reasons, such as user request, violation of terms of service, or inactivity. During deactivation, the user's data may be retained, allowing for potential reactivation in the future. When an account is deactivated, the user typically cannot log in or access their information. However, the specific policies regarding data retention and reactivation can vary by service, such as social media platforms like Facebook or Twitter. Users should review the terms of service for details.