[Chemical Knowledge]：What does LCP mean?

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LCP is called "Largest Contentful Paint", which is the maximum content drawing time in the page. It is a user experience metric that measures page load performance, especially in terms of visual experience.
in
layman's terms, LCP refers to the time it takes for the largest element of a page (such as an image or text) to be drawn on the screen. This time is often considered as one of the main indicators of page loading speed. According to Google's research, when the LCP time of a page is greater than 2.5 seconds, the bounce rate of users increases by more than 20%, which means that they will leave your website when the page loads too slowly.

Why is LCP important?

In the past, web designers and developers may have been concerned about the loading times of many parts of a page. They may be concerned about the load speed of elements such as page titles, website identifiers, and navigation bars, but in reality these elements are usually small and not the main contributors to page load speed. In contrast, the largest elements on a page are typically images, videos, animations, and other media types.

If these maximum media elements are slow to load at this time, the user experience of your website will be greatly affected. Therefore, LCP is very important as an effective indicator to measure the performance of a website.

How does LCP affect SEO?

In addition to ensuring the user experience, LCP is also very important for SEO. In Google's Page Experience update, Google made it clear that LCP will be a factor in search rankings. This means that a fast LCP will give a website priority in the ranking, while a slow LCP may penalize a website. How do

optimize LCP?

So, how do we improve LCP? Here are a few tips:

1. Compress image and video size.

In most cases, pictures and videos are one of the largest elements in a page, and compressing their size can greatly reduce LCP time.

2. Remove useless code and resources.

removing unused CSS and JavaScript files from your code makes the page load faster. This can be achieved by using code splitting and on-demand loading.

3. Use the browser cache.

When a user visits your website, the browser stores the website files in its local cache to be able to load faster. This will reduce server requests and thus increase LCP time.

4. Use a content delivery network (CDN).

use a CDN to make your site load quickly in a variety of geographic locations.

Summary

In the short article, we explain what LCP is and why it is important. We also detailed how to optimize LCP time by compressing image and video size, removing useless code and assets, using browser caching, and using CDNs.

Of course, LCP is only one of the factors that affect SEO ranking, but the importance cannot be ignored. By following the above tips, you can improve the user experience and improve the SEO ranking of your website.