Microsoft Defender for Endpoint (previously known as Microsoft Defender Advanced Threat Protection or Microsoft Defender ATP) is a unified endpoint security platform designed to help enterprise organizations prevent, detect, investigate, and respond to advanced cyberthreats.

The "P2" (or Plan 2) version of Microsoft Defender for Endpoint includes all the features of the standard version, as well as additional capabilities such as:

Endpoint detection and response (EDR) for Windows 10, macOS, Linux, and other platforms
Attack surface reduction (ASR) rules to block common attack techniques
Advanced hunting capabilities to search for and investigate potential security incidents
Threat and vulnerability management to prioritize and remediate security issues
Automated investigation and remediation to quickly respond to threats
Endpoint discovery and inventory to track and manage devices on your network
Integration with other Microsoft security products, such as Azure Sentinel and Microsoft 365 Defender, for a comprehensive security solution
Overall, Microsoft Defender for Endpoint P2 provides advanced threat protection and security features that help enterprise organizations stay ahead of the constantly evolving threat landscape.