How to Solve Core Web Vital Error on Wordpress?

Core web vitals are tricky to solve when using WordPress. But you can do
1. Add lazy loading
2. Low-quality image placeholders
3. Minification
4. Use system font
5. optimise images (use tools like tinypng to reduce image size rather over uploading full size image)
6. Use fewer plugins
7. Defer javascript
8. Keep custom scripts to footer tag
9. use light themes
10. Keep less content on Website
11. Optimise above the fold content and make sure, there is less shuffle while content loads (before scrolling the page)
12. Use CDN
13. Use compression Brotli/GZip
14. Use browser caching to take advantage of expiry headers
15. Caching of files

Every site performs differently with different themes/plugins over a different hosting, so please do experiment with these options.

First of all, you have to understand the reason why this issue has come.

For this, go to Google search and check the core web report and try to understand the reason.

Mainly the reason comes because of LCP, FID and Cls.

To improve all these, you have to fill some parameters full.

As you have to optimize your image well, serve the image in the next generation.

Try to remove Render Blocking Resources.

Minify JavaScript and CSS.

Remove unused JavaScript and use the right font.

After doing all this, you have to come to Google search and go to Validate Fix and click on validate.

This issue of yours will be solved in a few days.

How to use Core web vital in Search Console

First of all, you have to login to your Google Search Console. You will come to the homepage of Google search.

Here you will see the option of core web vital in the left side, by clicking on it you can extract the report of core web vital.

In the second way, you will be seeing the option of page experience. You have to click on it.

Here you will see the option of core web vital. You can extract your core web report from here.