Web performance

and make sure you are familiar with them. ， which attract and retain users， and JavaScript. To build websites and applications people want to use， Building websites requires HTML。

it is good to focus specifically on such topics too， and in this module you'll focus on the fundamentals of how to create performant websites. The rest of our beginner's learning material tries to stick to web best practices such as performance and accessibility as much as possible，。

CSS， you need to create a good user experience. Part of good user experience is ensuring the content is quick to load and responsive to user interaction. This is known as web performance ， however。