The author created a Twitter clone called NotRealTwitter (NRT) using Bubble to demonstrate its power. Before starting, they figured out the app's structure, which consisted of four main pages: index, home, profile, and notifications. The database was structured with data types such as Tweet, User, and Image, each with their respective fields. For UI elements, the author used conditional formatting, screenshots, and custom states to achieve a similar look and feel to Twitter's buttons and page layout. The app included features like creating tweets, notifications for follow/favorite/retweet actions, and displaying unread notifications. The workflows were created using Bubble's visual interface, allowing for dynamic content and interactions between elements.