Performance jargon: LCP: Largest Contentful Paint - How long it takes for...
Performance jargon:
LCP: Largest Contentful Paint - How long it takes for the largest piece of content to show.
FID: First Input Delay - How long it takes the app to respond to the first interaction.
CLS: Cumulative Layout Shift - How much things shift around during loading.
More details: https://web.dev/vitals/