Electron is an open-source framework that allows developers to create desktop applications using JavaScript, HTML, and CSS. It allows building cross-platform desktop apps that can be installed and run locally on a computer like regular native apps. Apps built with Electron can access low-level system features and integrate normal web app technologies and libraries. To create an Electron app, developers install Node.js, set up a new project using NPM or Yarn, install Electron, and launch the app using "electron ." in the command line. Electron apps emit events like "ready" and "window-all-closed" and allow creating browser windows, menus, notifications, and using IPC for interprocess communication.