What they actually see.
WHAT HAPPENS
The page is requested, then rendered much as a browser would.
WHY THAT MATTERS
Content loaded by scripts may or may not be seen.
WHAT IS SAFE
Content present in the HTML when the page is delivered.
WHAT IS RISKIER
Content loaded afterwards by JavaScript Content requiring interaction to appear Content behind tabs or accordions that do not load until clicked
THAT LAST ONE
Frequently fine, and worth checking.
HOW TO CHECK
Search Console offers a tool showing how a page was rendered.
Or disable JavaScript in your browser and load the page.
What remains is roughly what is reliably seen.
WHAT TO NEVER BLOCK
CSS and JavaScript files in robots.txt.
Blocking them prevents proper rendering and harms your site.
WHAT THIS MEANS FOR FRAMEWORK SITES
Client-rendered content is a risk.
Static generation or server rendering is safer.
WHAT TO VERIFY
That your important content appears in the rendered version.