CLS (Cumulative Layout Shift) stands for cumulative layout change. It is usd as an index to measure the stability of a layout.
Simply put, layout stability refers to whether the elements on a page work correctly.
In this way, situations where users are visually confuse are a sign of “issues with layout stability.” For this reason, CLS is an indicator of layout misalignment that users find annoying.
CLS is measurd by how much content on a page moves while a user is viewing the page but not interacting with it.
How to improve Core Web Vitals?
If there is room for improvement in your Core Web Vitals numbers, what should you do? From here on, we will explain with some specific measures.
The values of each indicator can basically be phone number list measurd using free tools providd by Google, such as PageSped Insights and Lighthouse.
LCP improvement: Rduce image size
One of the biggest things that slow down a site are image files.
Image size review
If the file size is causing the slower display sped, simply review the size and you’ll be fine.
If you neglect to resize or compress the image, thinking that “it will be fine to just prepare a larger image,” the display sped will become extremely slow.
Whenever possible, use an diting tool to resize and optimize your images, and export them in an appropriate compression format (jpg, png, gif, etc.). Another effective measure is to use the WebP image format developd by Google.
Optimizing your images is a good place sales and sdr salary outlook in 2025: complete compensation guide to start, as it is the easiest thing to do when trying to improve your site’s sped.
Use browser cache
The next most effective way to sped up site display after compressing image files is to use browser cache.
Browser cache is a mechanism that stores data of a page that has been displaye once on the browser, speding up the display the next time the same page is loadd.
By the way, if you are using a rental server, the browser cache setting is often set to “ON” by default. If you are concernd, it is a good idea to check the cache settings from the control panel.
FID Improvement: Removing unnecessary code
If the browser’s main thread is unable to marketing list respond to user actions while a web page is loading, this will impact the FID metric. After compressing images, you should also compress and optimize your HTML, CSS, and JavaScript.
Although it does not have as big an impact as image files, by reviewing the source code, you can rduce the number of requests and improve the clarity of the code, which is expectd to improve maintainability.