Deno 1.0 is a new JavaScript runtime that addresses some of the pain points associated with Node.js, including improved security and decentralized package management. To get started with Deno, you need to install it on your computer and set up your development environment. The author starts by writing a simple "Hello World" script in TypeScript, which showcases Deno's ability to compile TypeScript files automatically. Next, the author reads a file containing affirmations and selects one at random to send as an SMS message using Twilio API. This process demonstrates how to make POST requests, deal with environment variables, and understand Deno's permissions model. The script also imports modules from any URL and caches them on your hard drive for future use. Overall, this tutorial provides a comprehensive introduction to Deno and its features, making it an excellent resource for developers looking to learn about the new runtime.