RVM (Ruby Version Manager) is a command-line tool designed to simplify the management of multiple Ruby environments. It enables users to install, switch between, and manage different Ruby interpreters (MRI, JRuby, Rubinius) and gemsets. RVM ensures that each project has its own self-contained environment, preventing version conflicts and streamlining development workflows. By isolating gem dependencies, RVM enhances system security and stability, reducing the risk of conflicts and downtime. It is particularly beneficial for developers working on multiple Ruby-based applications with varying gem requirements, allowing for efficient testing, deployment, and overall environment management. RVM is maintained by the community and promotes safer, non-root use of Ruby.