The First Input Delay metric measures the
Posted: Tue Jan 07, 2025 5:13 am
The Core Web Vitals , along with four other factors, make up the signals that Google uses to evaluate the user experience :
Mobile friendly
Safe browsing
HTTPS
No intrusive interstitials
For the moment, Google has announced that the Page Experience Update will only affect mobile rankings . Therefore, it will only impact mobile traffic.
What are Core Web Vitals?
Core Web Vitals, as a Google initiative, was born from the need to provide a unified method to developers and webmasters, allowing them to easily detect UX and WPO problems on a website .
In this regard, Google has identified three indicators that it considers essential to provide a good user experience. These three metrics are focused on measuring the time it takes to load a website , the speed of interaction with the user and its visual stability .
Where does Google get these metrics?
Google obtains this data from real users ' browsing . That is, it uses data from your Chrome browser and stores it anonymously in its Chrome User Experience Report .
Google obtains data from all users who access each URL on the website .
Metrics will be affected by the type of device and network connection that users have . In other words, users who have fast browsing will perceive metrics differently than another user who does not have a good network connection and/or whose mobile device is an older model.
Google calculates each metric by covering 75% of users . This means that depending on which markets our site is targeting, we must take into account fluctuations in user perception depending on where we live.
Core Web Vitals are collected on a device-by-device basis . That is, Google calculates mobile (including AMP) and desktop metrics separately.
Largest Contentful Paint (LCP)
The metric Largest Contentful Paint metric measures the time it takes for the largest content to be rendered on the screen (above the fold) .
Indicates the moment when the user sees something relevant on the screen (without scrolling)
Server response time is included in the measurement
The LCP may correspond to a image, text or video
To provide a good user experience, the LCP should occur at 2.5 seconds or less . Up to 4 seconds, Google considers the result to be improvable, and above this threshold, it considers it slow.
First Input Delay (FID)
time that elapses from the user's first interaction until the browser responds to it .
To deliver a good user experience, FID must occur in 100 milliseconds or less turkey number data . Up to 300 milliseconds, Google considers the result to be improvable, and above this threshold, it considers it slow.
Reveals information about the user's first impression when clicking on the website
The metric will be altered depending on the time, browser and element clicked by the user.
This metric cannot be simulated in a laboratory . It can only be measured on real users.
Total Block Time ( TBT) is a lab metric for testing without any direct user interaction . It is also advisable to consider the interaction time (TTI). These two metrics can help make estimates about user perception on different network and device types.
Cumulative Layout Shift (CLS)
The Cumulative Layout Shift metric is responsible for evaluating the visual stability of a website.
The less elements scroll during loading , the less likely the user will accidentally click on one of them.
Page elements are measured using session windows . Session windows correspond to different parts of a web page that a user reaches when scrolling. The total score for each session window is called cumulative layout shift (CLS).
The CLS does not measure time , but rather performs a calculation of changes in positions.
Mobile friendly
Safe browsing
HTTPS
No intrusive interstitials
For the moment, Google has announced that the Page Experience Update will only affect mobile rankings . Therefore, it will only impact mobile traffic.
What are Core Web Vitals?
Core Web Vitals, as a Google initiative, was born from the need to provide a unified method to developers and webmasters, allowing them to easily detect UX and WPO problems on a website .
In this regard, Google has identified three indicators that it considers essential to provide a good user experience. These three metrics are focused on measuring the time it takes to load a website , the speed of interaction with the user and its visual stability .
Where does Google get these metrics?
Google obtains this data from real users ' browsing . That is, it uses data from your Chrome browser and stores it anonymously in its Chrome User Experience Report .
Google obtains data from all users who access each URL on the website .
Metrics will be affected by the type of device and network connection that users have . In other words, users who have fast browsing will perceive metrics differently than another user who does not have a good network connection and/or whose mobile device is an older model.
Google calculates each metric by covering 75% of users . This means that depending on which markets our site is targeting, we must take into account fluctuations in user perception depending on where we live.
Core Web Vitals are collected on a device-by-device basis . That is, Google calculates mobile (including AMP) and desktop metrics separately.
Largest Contentful Paint (LCP)
The metric Largest Contentful Paint metric measures the time it takes for the largest content to be rendered on the screen (above the fold) .
Indicates the moment when the user sees something relevant on the screen (without scrolling)
Server response time is included in the measurement
The LCP may correspond to a image, text or video
To provide a good user experience, the LCP should occur at 2.5 seconds or less . Up to 4 seconds, Google considers the result to be improvable, and above this threshold, it considers it slow.
First Input Delay (FID)
time that elapses from the user's first interaction until the browser responds to it .
To deliver a good user experience, FID must occur in 100 milliseconds or less turkey number data . Up to 300 milliseconds, Google considers the result to be improvable, and above this threshold, it considers it slow.
Reveals information about the user's first impression when clicking on the website
The metric will be altered depending on the time, browser and element clicked by the user.
This metric cannot be simulated in a laboratory . It can only be measured on real users.
Total Block Time ( TBT) is a lab metric for testing without any direct user interaction . It is also advisable to consider the interaction time (TTI). These two metrics can help make estimates about user perception on different network and device types.
Cumulative Layout Shift (CLS)
The Cumulative Layout Shift metric is responsible for evaluating the visual stability of a website.
The less elements scroll during loading , the less likely the user will accidentally click on one of them.
Page elements are measured using session windows . Session windows correspond to different parts of a web page that a user reaches when scrolling. The total score for each session window is called cumulative layout shift (CLS).
The CLS does not measure time , but rather performs a calculation of changes in positions.