Explore the critical importance of security headers in web application protection through this 41-minute conference talk from Devoxx Poland 2023. Learn why security headers are essential components of modern web security architecture and discover how they serve as the first line of defense against various cyber threats. Understand the fundamental role these HTTP response headers play in instructing browsers on how to handle your web content securely, including protection against cross-site scripting (XSS), clickjacking, and other common web vulnerabilities. Gain insights into the practical implementation of security headers and their impact on overall application security posture. Master the concepts behind Content Security Policy (CSP), X-Frame-Options, Strict-Transport-Security, and other crucial security headers that every web developer should understand and implement to create more secure web applications.