Envoyer is a deployment tool designed to streamline and automate the deployment process for web applications. It offers a zero-downtime deployment solution, which ensures that your web application remains accessible to users during updates. Envoyer is particularly well-suited for teams using Laravel, as it integrates seamlessly with this PHP framework, but it also supports other types of projects. Key features include the ability to manage environment variables, run deployment hooks, and monitor deployment health with notifications. By simplifying the deployment process, Envoyer helps developers focus more on coding and less on infrastructure.