The document details the author's personal experience migrating a shared rides app to Salesforce Lightning Experience, highlighting key steps such as creating a new org, upgrading the app, and removing irrelevant features. It emphasizes the need for separate management of classic and lightning versions of the app and discusses the creation of a lightning component to replace a JavaScript button. The author also shares challenges faced with UI consistency, mobile layout issues, and the use of the Salesforce Lightning Design System during the migration process.