This course is designed for those new to web performance, a vital aspect of the user experience. It covers key web performance concepts and techniques for improving performance.| web.dev
As a page loads, many resources are referenced within its HTML that provide a page with its appearance and layout through CSS, as well as its interactivity through JavaScript. In this module, a number of important concepts related to these resources and how they affect a page's load time are covered.| web.dev