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Learn in-depth about LCP, INP and CLS metrics that directly affect your website's Google ranking and user experience. 2026 Technical and comprehensive performance improvement guide in accordance with SEO standards.
Core Web Vitals are three basic performance metrics that Google determines to measure the user experience (UX) quality of a web page and uses as a search engine ranking factor. These metrics, announced in 2020 and constantly evolving, are at the center of artificial intelligence-assisted search (AGE) and semantic web standards as of 2026 .
Just having your website "load fast" is no longer enough. How quickly the user can interact with the page (INP), how much visual stability is maintained (CLS), and when the main content appears (LCP) are critical. Google collects these metrics under "Page Experience" signals and forms the technical basis of the E-E-A-T (Experience, Expertise, Competence, Trustworthiness) criteria.
For a successful SEO strategy web design All processes, from stage to server configuration, must be Core Web Vitals compatible.
Largest Contentful Paint. The loading time of the page's largest image or text block.
Interaction to Next Paint. The browser's response time to interactions such as clicks and touches.
Cumulative Layout Shift. The amount of unexpected shifting of elements as the page loads.
LCP represents when the user sees the "main content" of the page. This is usually a hero image, video poster image, or large title text. LCP time for a good user experience 2.5 in under a second should be.
below .htaccess You can contribute to your LCP score by optimizing browser caching times with the following code:
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# Browser Caching Optimization
<IfModule mod_expires.c>
ExpiresActive On
# Images
ExpiresByType image/jpg "access plus 1 year"
ExpiresByType image/jpeg "access plus 1 year"
ExpiresByType image/gif "access plus 1 year"
ExpiresByType image/png "access plus 1 year"
ExpiresByType image/webp "access plus 1 year"
# Fonts
ExpiresByType font/sfnt "access plus 1 year"
ExpiresByType font/woff2 "access plus 1 year"
# CSS & JS
ExpiresByType text/css "access plus 1 month"
ExpiresByType application/javascript "access plus 1 month"
</IfModule>INP, which replaced the FID (First Input Delay) metric in March 2024, measures the overall interaction speed of the page. It analyzes not only the first click, but also the average delay of all interactions (menu opening, form filling, adding to cart) during the user's time on the page. Target time 200 is submillisecond.
CLS measures the unexpected displacement of elements as the page loads. An example of bad CLS is when the user wants to click on a button but clicks in the wrong place because of an ad that suddenly appears. score Below 0.1 should be.
The most common causes of CLS include unspecified images, dynamically loaded ads, and lazy loading of web fonts (FOIT/FOUT).
To fix CLS, always check your images and iframes. width and height Give the values in HTML. This allows the browser to reserve space before the image is loaded.
<!-- Yanlış Usage (CLS Sorunu Yaratır) -->
<img src="hero.jpg" alt="Hero Image">
<!-- Correct Usage (Yer Tutucu Ayrılır) -->
<img
src="hero.jpg"
width="800"
height="600"
alt="Hero Image"
style="max-width: 100%; height: auto;"
>
<!-- Font Preload ile Kaymayı Önleme -->
<link
rel="preload"
href="/fonts/roboto.woff2"
as="font"
type="font/woff2"
crossorigin
>Software optimization is important, but on a slow server optimizations have limited impact. As Eka Sunucu, we use special hardware and software to maximize your Core Web Vitals scores.
It is up to 10 times faster than Apache. It provides tremendous speed in WordPress and other CMSs with the LSCache plugin.
Detailed Information →It accelerates database queries and file uploads by offering 6 times faster data reading/writing speed than SATA SSDs.
With support for PHP 8.1, 8.2 and 8.3 , it allows your codes to run more efficiently and reduces the processor load.
It minimizes latency and increases connection speed with the latest network protocols.
Strong infrastructure that will turn your Core Web Vitals scores into green.