The network effect is a phenomenon where a product or service becomes more valuable as more people use it. In cybersecurity, this often refers to platforms or security tools that improve their effectiveness with increased user participation. For example, threat intelligence platforms become more robust as more organizations contribute data, making it easier to detect and respond to cyber threats. The network effect can also apply to security vulnerabilities, where the widespread adoption of a vulnerable system increases the impact of potential attacks. Understanding the network effect helps organizations leverage collective security and be aware of risks associated with widely used technologies.