In an era where remote work is increasingly prevalent and the digital landscape is continuously expanding, the need for robust endpoint and application security has never been more critical. Endpoints—ranging from laptops and desktops to smartphones and tablets—serve as gateways to an organization's sensitive data and resources. As these devices become more integrated into everyday business operations, they also present attractive targets for cybercriminals. This chapter explores the multifaceted domain of endpoint and application security, highlighting the strategies and technologies essential for protecting these critical components of the IT ecosystem.