# What Speed Index means and how to improve it

> Speed Index scores how quickly the visible part of the page fills in. Under 3.4 s is good. It rewards showing content early rather than all at once at the end.

Speed & Core Web Vitals · HTML version: https://getreport.app/learn/speed-index

## Speed Index

Passing looks like: Speed Index passes.

**Why it matters.** Speed Index scores how quickly the visible part of the page fills in. A low number means visitors see a complete page early, even if scripts are still loading behind it.

**How to fix it.**

1. Prioritise above-the-fold content — critical CSS inline, hero image preloaded, everything else deferred.
2. Avoid client-side rendering for the first screen; server-render it.

Check your own page: https://getreport.app/