# How would you diagnose poor LCP?

> Start by determining what the LCP element is.

Typical candidates include:

- hero image;

- large heading;

- banner;

- video poster.

Then investigate:

- server response time;

- render-blocking resources;

- image discovery;

- image format and size;

- preload behavior;

- client-side rendering;

- third-party scripts.

Separate the problem into:

**TTFB → resource load delay → resource load duration → render delay**

Use real-user data to understand production behavior.

## Sources

- [web.dev — LCP](https://web.dev/articles/lcp)

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Answered by Abhinav Krishna (https://www.theseocentral.com/author/abhinav-krishna)
Source: https://www.theseocentral.com/technical-seo-faq/how-would-you-diagnose-poor-lcp