In this recipe, you will learn the steps to use the rust-clippy tool. The tool basically helps the developer to catch common mistakes and improves your Rust project code by having a collection of lints. The Clippy tool currently works with the latest Rust nightly for now. Since this is a tool for helping the developer of a library or an application to write better code, it is recommended not to include Clippy as a hard dependency and it is mostly used as an optional dependency.