Signal spam refers to the unsolicited and unwanted messages or advertisements that are sent through various communication channels, such as email, text messages, or social media platforms. These messages are often sent in bulk and without the consent of the recipient, making them a nuisance and a potential security threat. Signal spam can also refer to the use of automated systems to flood communication channels with repetitive or irrelevant content, disrupting the normal flow of communication. It is a form of digital pollution that can be harmful to individuals and businesses alike, and is often used for malicious purposes such as phishing scams or spreading malware.