Cargo is a tool that allows the Rust application to declare their various dependencies to ensure that you will able to recreate the build by following the same dependencies and version.

At a higher level, it offers configuration management to the Rust project and helps in reproducing the development environment. Usually, in other languages, it's a very tedious and time-consuming process to maintain the different dependencies and configure them each and every time we deploy the application in a different environment.

Cargo provides features out of the box which enables developers and project managers to ship/deploy Rust projects/applications very quickly and without much hassle; this is a very big advantage over other languages.