Wrangler is the command-line interface (CLI) tool for developing and deploying applications to Cloudflare Workers. It simplifies the process of building and managing serverless functions on Cloudflare's edge network. Utilizing Wrangler, developers can easily create, test, and deploy JavaScript and TypeScript code, manage secrets, and configure environment variables for their Workers projects. Ultimately, Wrangler streamlines the entire lifecycle, enhancing developer productivity and facilitating the implementation of edge-based applications.