---
updatedAt: 2025-06-23T22:28:03.000Z
agentTools:
  projectIndex: https://support.speedcurve.com/llms.txt
---

# Core Web Vitals

Core Web Vitals are a

## Largest Contentful Paint (LCP)

## Cumulative Layout Shift (CLS)

## First Input Delay (FID)

## Total Blocking Time (TBT)

First Input Delay relies on a visitor interacting with the page – a click on a button is only available form R