Why can't I open google.com in my browser?

Hard to determine or limit this symptom to one cause

through remote non-scientific diagnostics. ~A guess

might be that you could be located in a region where

a server or government might decide to block URLs.

Or try another browser to see if something else can

access web sites, if your default web access won't.

What browser are you using? Have you tried a different browser like Brave or Firefox?

What happens when you try?

Have you installed and run any "cleaning", "optimizing", "speed-up", anti-virus or VPN apps on your Mac?