OWASP stands for the Open Web Application Security Project. It's an open-source project dedicated to improving the security of software. OWASP provides tools, resources, guidelines, and documentation to help developers, businesses, and security professionals protect web applications against security vulnerabilities and threats.

Key Aspects of OWASP

1. OWASP Top Ten: The most well-known resource, which is a regularly updated list of the ten most critical security risks for web applications. It helps organizations prioritize security issues that are common and often exploited.

2. OWASP ZAP (Zed Attack Proxy): A popular open-source tool for security testing. It helps identify vulnerabilities in web applications by performing automated scans and manual testing.

3. OWASP ASVS (Application Security Verification Standard): A framework that provides a list of application security requirements for organizations to build secure applications. It helps define what “secure” means and assists in security testing.

4. OWASP SAMM (Software Assurance Maturity Model): A maturity model for software security that helps organizations assess, build, and improve their security programs. It provides guidelines and practices for secure software development.

5. Cheat Sheets and Other Resources: OWASP offers cheat sheets, guidelines, and documentation on various security topics like SQL Injection, Cross-Site Scripting (XSS), authentication, encryption, etc.

6. Community and Chapters: OWASP is a global community with local chapters worldwide, providing workshops, events, and resources to promote application security awareness and collaboration.

OWASP resources are freely available, and they are widely used by developers, security professionals, and organizations of all sizes to build more secure software.