Web Application Security refers to the measures and practices designed to protect web applications from various threats and vulnerabilities. These applications, which run on servers and are accessed through the internet, can be targets for cyberattacks. Common threats include SQL injection, cross-site scripting (XSS), and cross-site request forgery (CSRF), which can compromise sensitive data and disrupt services. To ensure web application security, developers implement various strategies, such as regular security testing, code reviews, and using secure coding practices. Additionally, employing tools like firewalls and encryption helps safeguard data during transmission, making it harder for attackers to exploit weaknesses in the application.