Generating short URLs typically involves using a URL shortening service. Here are the steps: 1. Choose a URL shortening service like Bitly, TinyURL, or Google URL Shortener. 2. Copy the long URL you wish to shorten. 3. Paste the long URL into the shortening service's input field. 4. Click the button to generate the short URL. 5. Copy the generated short URL and use it in your email marketing campaign.