GLOSSARY TERM
What is Render-Blocking Resources?
Definition
Stylesheets and scripts that prevent the browser from rendering the page until they finish downloading and parsing. Common culprits: external CSS files, synchronous scripts in the head, third-party widgets.
Why it Matters for AI Search
Render-blocking resources are the primary cause of slow FCP and LCP. Defer non-critical JavaScript with the defer or async attributes; inline critical CSS; and audit third-party tags ruthlessly — most "essential" widgets are only essential to whoever installed them.
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