You must not:
- place Google-served ads on screens that contain malicious software or "malware" that may harm or gain unauthorized access to a computer, device, or network.
Examples: Computer viruses, ransomware, worms, trojan horses, rootkits, keyloggers, dialers, spyware, rogue security software, and other malicious programs or apps
- place Google-served ads on screens that violate Google's Unwanted Software policy.
Examples: Failure to be transparent about the functionality that the software provides or the full implications of installing the software; failing to include Terms of Service or an End User License Agreement; bundling software or applications without the user's knowledge; making system changes without the user's consent; making it difficult for users to disable or uninstall the software; failing to properly use publicly available Google APIs when interacting with Google services or products
Tips for understanding this policy
Malicious or unwanted software | Google Publisher Policies
The example image below shows what types of content may be malware or unwanted software.