Google has now announced the Web Vitals initiative which aims
to provide “unified guidance for quality signals that are
essential to delivering a great user experience on the web”.
• Core Web Vitals are a subset of all the Web Vitals that apply to
all web pages, should be measured by all website owners, and
will be surfaced across all Google tools. Currently, these Core
Web Vitals focus on three aspects of the user experience —
loading, interactivity, and visual stability — and include the
following metrics:
all web pages, should be measured by all website owners, and
will be surfaced across all Google tools. Currently, these Core
Web Vitals focus on three aspects of the user experience —
loading, interactivity, and visual stability — and include the
following metrics:
• Largest Contentful Paint (LCP): measures loading
performance. To provide a good user experience, LCP should
occur within 2.5 seconds of when the page first starts loading.
performance. To provide a good user experience, LCP should
occur within 2.5 seconds of when the page first starts loading.
• First Input Delay (FID): measures interactivity. To provide a
good user experience, pages should have a FID of less than 100
milliseconds.
good user experience, pages should have a FID of less than 100
milliseconds.