How to Improve INP Score in Mobile

Question

I am not able to identify why the mobile INP score of guru99.com is high

I thought Ads the culprit but a page: https://www.guru99.com/wysiwyg-web-builder.html

Which has no ads has still high INP score: https://pagespeed.web.dev/analysis/https-www-guru99-com-wysiwyg-web-builder-html/f4hs0ijbyu?form_factor=mobile

Then I thought it is images but https://www.guru99.com/workflows-informatica.html

But this page seems to load fine.

Can you please help identify what should be done?

Answer 1

INP is a measure of responsiveness so in general images do not cause issues (though they can affect the other Core Web Vitals - LCP, and CLS).

When you say a page without ads still has a high INP score you need to be careful what PageSpeed Insight's is showing you here. You are seeing the site-level INP score:

Ads, can be a common cause of INP issues, especially on mobile, as they can involve quite a lot of processing, processing time that is not available for responding to users, so that's not a bad guess.

Ultimately you need to measure INP on your site while doing interactions (see this document for more information) or, ideally, measure the slow interactions from your users to help identify them.