A redirection chain in cybersecurity refers to a sequence of automatic website redirects that guide a user from an initial, seemingly safe URL through several intermediary sites, ultimately landing them on a potentially harmful or malicious destination. Attackers often use redirection chains to evade detection and filtering mechanisms, making it harder for security systems to identify the final malicious site. These chains can be used for phishing, malware delivery, or unwanted advertising. Each step in the chain may serve to mask the true intent of the destination, complicating efforts to trace and block the threat. Understanding redirection chains is crucial for detecting and mitigating advanced web-based attacks.