If you have a website, what do the changes mean to you?
You should check how your website is performing and discover if you need to take action.
Googles Core Web Vital's update means it will include the time a page takes to load on a mobile device, the length of time before the page is interactive and the time it takes before the page is visually stable.
You can test your site here. Remember to click both the desktop and mobile tabs after testing to view results on both device types.
Core web vital's, are specified as follows.