Electron is a framework to build desktop GUI applications by using widely popular technologies like JavaScript, HTML, and CSS. Its main goal is to give you an easy platform to develop your application and it does so by taking care of all the complex functionalities under the hood. This means that you’ll be able to develop these apps more quickly but you’ll have to pay for some overhead, given this framework’s dependency on Chromium. 

Electron is a free and open-source software framework developed and maintained by GitHub. It allows for the development of desktop GUI applications using web technologies: it combines the Chromium rendering engine and the Node.js runtime.