# What typically causes poor INP?

> INP measures responsiveness to user interactions.

Common technical causes include:

- long JavaScript tasks;

- excessive event handlers;

- expensive DOM operations;

- large client-side applications;

- third-party scripts;

- long rendering work after interaction.

Optimization should focus on reducing main-thread blocking and making interactions complete quickly.

## Sources

- [web.dev — INP](https://web.dev/articles/inp)
- [Google Search Central — Core Web Vitals](https://developers.google.com/search/docs/appearance/core-web-vitals)

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Answered by Abhinav Krishna (https://www.theseocentral.com/author/abhinav-krishna)
Source: https://www.theseocentral.com/technical-seo-faq/what-typically-causes-poor-inp