safe-buffer is a Node.js library providing a safer way to create and manipulate buffers. It mitigates potential security vulnerabilities related to unchecked or user-controlled buffer allocations. It guards against common issues like denial-of-service attacks stemming from excessive memory allocation, promoting more secure and reliable Node.js applications. It avoids the deprecated new Buffer() constructor, a known source of security holes. Using safe-buffer is recommended for projects needing robust handling of binary data.