Malicious websites are sites designed to harm your device, steal your information, or trick you into taking unsafe actions. They might look like normal websites but often contain hidden malware, phishing traps, or scams. Some try to get you to download infected files, enter sensitive data like passwords or credit card numbers, or click on deceptive ads. These sites are often used by cybercriminals to spread viruses, commit fraud, or gain unauthorized access to your accounts or systems.