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It depends on your threat level. If you're just trying to avoid phishing, it's great, something like 99.9% effective. However, if you're worried you'll be targeted, where someone will go through the effort to do this to you specifically, then it's not a good choice.

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2FA does not fully protect you against phishing. The attacker can just passthrough all credentials including your 2FA code. It limits the attack to a time window and any further security sensitive changes that require 2FA may be protected unless the user naively re-enters their code.

U2F/ WebAuthn credentials can't be passed through.

Or in more detail, the credentials aren't human readable and are per-FQDN, so when you visit badguy.example thinking it's goodguy.example, your Security Key will cheerfully hand over valid credentials for badguy.example, but there is no way to give them credentials for goodguy.example because that's not where you are.

Hence that 100% score on Google's page.

Meant to say TOTP or SMS 2FA.

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