It’s rare that you will need to use a JavaScript label. In fact, you can lead a very fulfilling career without ever knowing that this exists. But, on the offhand chance you find that one place where this syntax helps out, you’re now empowered to use it.

Learn how to use the Chrome DevTools Performance tab to measure and improve the speed of your website.

Remember the goal isn’t to score high in a testing tool, or even to meet a WCAG guideline, but rather to make your content more widely available, including to assistive technology users.

Third-party scripts, or "tags" can be a source of performance problems on your site, and therefore a target for optimization. However, before you start optimizing the tags you have added, make sure that you are not optimizing tags you don't even need. This article shows you how to assess requests for new tags, and manage and review existing ones.