WEB VITALS

 WHAT ARE WEBSITE VITALS?

Website Vitals is a set of metrics that measure loading performance, interactivity, and visual stability of the webpage.

An illustration representing Core Web Vitals, a set of key web performance metrics. The graphic features a smartphone displaying a heart monitor symbol, symbolizing user experience. Three yellow circular icons are labeled with the acronyms “LCP” (Largest Contentful Paint), “FID” (First Input Delay), and “CLS” (Cumulative Layout Shift), connected to the phone. On the left side, the text “Core Web Vitals” is prominently displayed, along with a colorful bar chart above the phone suggesting performance levels. The background is teal.

HOW WEBSITE VITAL IMPACT WEBSITE PERFORMANCE?

Speed & Responsiveness

  • A good LCP and FID mean your site loads fast and responds quickly to user actions.

User Experience

  • A stable layout (low CLS) ensures users don’t get frustrated by shifting content (like buttons jumping around).

Search Engine Ranking (SEO)

  • Google uses Core Web Vitals as a ranking factor. Better vitals better chance of showing up higher in search results.

Conversion Rates

A slow, janky site kills conversions. Even small improvements in load time can lead to significant gains in sales, sign-ups, or clicks.

WHAT IS FCP? WHAT IS ITS STANDARD VALUE?

FCP stands for First Contentful Paint. It’s a measure used in web performance
to show how quickly a web page starts to show something useful to the user.

Standard Value

  • Good-Less than 1.8seconds
  • Needs improvement-1.8-3.0seconds
  • Poor -More than 3.0 seconds
    A graphic illustrating the First Contentful Paint (FCP) web performance metric. It is divided into three colored sections: green for "GOOD" (under 1.8 seconds), yellow for "NEEDS IMPROVEMENT" (between 1.8 and 3.0 seconds), and red for "POOR" (over 3.0 seconds). The acronym "FCP" is prominently displayed at the top, with "First Contentful Paint" written underneath.

WHAT IS LCP? WHAT IS ITS STANDARD VALUE?

LCP stands for Largest Contentful Paint. It measures how long it takes for the biggest visible content (like a large image or main text block) to load and appear on the screen.

Standard Value

  • Good-Less than 2.5 seconds
  • Need improvement-2.5 to 4.0 seconds
  • poor-More than 4.0 seconds

A graphic showing the Largest Contentful Paint (LCP) web performance metric. It features three colored sections: green labeled "GOOD" for times under 2.5 seconds, yellow labeled "NEEDS IMPROVEMENT" for times between 2.5 and 4.0 seconds, and red labeled "POOR" for times over 4.0 seconds. The acronym "LCP" is prominently displayed above, with "Largest Contentful Paint" written below it.

WHAT IS TBT? WHAT IS IT STANDARD VALUE?

TBT stands for Total Blocking Time. It measures how much time the browser is "blocked" and can't respond to user input (like clicks, taps, or keyboard actions) while the page is loading.

Standard Values

  • Good-Less than 200 milliseconds
  • Need improvement-200-600 milliseconds
  • Poor- More than 600 milliseconds

A graphic illustrating the Total Blocking Time (TBT) web performance metric. It has three color-coded sections: green labeled "GOOD" for times under 300 milliseconds, yellow labeled "NEEDS IMPROVEMENT" for times between 300 and 600 milliseconds, and red labeled "POOR" for times over 600 milliseconds. The acronym "TBT" is displayed prominently at the top, with "Total Blocking Time" written underneath. The background is a solid blue color.

WHAT IS CLS? WHAT IS ITS STANDARD VALUE?

CLS stands for Cumulative Layout Shift. It measures how much the layout of a webpage shifts around while it's loading.

Standard Value

  • Good-Less than 0.1
  • Need improvement-0.1-0.25
  • Poor-More than 0.25
    A graphic showing the Cumulative Layout Shift (CLS) web performance metric. It includes three color-coded categories: green labeled "GOOD" for scores under 0.1, yellow labeled "NEEDS IMPROVEMENT" for scores between 0.1 and 0.25, and red labeled "POOR" for scores above 0.25. The acronym "CLS" is prominently displayed at the top, with "Cumulative Layout Shift" written beneath it.

WHAT IS TTFB? WHAT IS ITS STANDARD VALUE?

TTFB stands for Time to First Byte. It measures how long it takes for a browser to get the first piece of data from the server after a user requests a web page.

Standard Values

  • Good-Less than200 milliseconds
  • Need improvement-200-500ms
  • Poor-More than 500ms
    A graphic illustrating the Time to First Byte (TTFB) web performance metric. The visual is divided into three color-coded sections: green labeled "GOOD" for times under 800 milliseconds, yellow labeled "NEEDS IMPROVEMENT" for times between 800 and 1800 milliseconds, and red labeled "POOR" for times over 1800 milliseconds. The acronym "TTFB" is displayed prominently at the top, with "Time To First Byte" written below it.

WHAT IS FID? WHAT IS ITS STANDARD VALUE?

FID stands for First Input Delay. It measures how long it takes for a website to respond when a user first interacts with it — like clicking a button, link, or typing in a field.

Standard Value

  • Good-Less than 100 milliseconds
  • Need improvement-100-300 milliseconds
  • Poor-More than 300 milliseconds



A graphic depicting the First Input Delay (FID) web performance metric. It is segmented into three color-coded categories: green labeled "GOOD" for delays under 100 milliseconds, yellow labeled "NEEDS IMPROVEMENT" for delays between 100 and 300 milliseconds, and red labeled "POOR" for delays over 300 milliseconds. The acronym "FID" is prominently shown at the top, with the full term "First Input Delay" written underneath.









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