This document provides an overview of using the Hardhat development environment to build smart contracts and decentralized applications (dApps) on Polygon. It explains that Hardhat facilitates compiling, testing, and debugging smart contracts while incorporating a local Polygon test network for deployment and debugging. The document then lists 3 tutorials that guide users through setting up their environment, creating a Hardhat project, writing a sample ERC-20 token contract and tests, and deploying to local and Polygon testnets. A basic understanding of JavaScript, terminals, Git, smart contracts, and Metamask is recommended.