Build with URL is a feature by Lovable that enables users to transform ideas and notes into working applications instantly, facilitating a seamless creative process without interrupting workflow. By embedding a "Build with Lovable" button in websites or applications, users can convert meeting notes or product requirement documents into interactive prototypes with a single click, thus enhancing collaboration and speeding up the prototyping process. The feature allows automation of workflows by integrating with internal tools or scripts, and provides the ability to share app links for collaborative purposes. Each Build with URL link contains an encoded prompt that Lovable uses to automatically authenticate and create the app, simplifying the development process and making it accessible to users regardless of technical expertise.