The Netlify CLI allows developers to share a live development server over HTTPS when running the command `netlify dev --live`, creating an open tunnel for remote collaboration. This feature is similar to tools like ngrok but built directly in the Netlify CLI, offering additional features and functionality. To try it out, install the Netlify CLI with `npm install netlify-cli -g` and connect a local project to a site on Netlify using `netlify init` or `netlify link`. Once connected, run `netlify dev --live` to start the server and generate a shareable link. The browser will automatically open with the `.live URL`, allowing for seamless remote collaboration.